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[email protected] March 12th 09 07:53 PM

Yamaha F150 break-in
 
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.

My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat

HK March 12th 09 08:04 PM

Yamaha F150 break-in
 
wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.

My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.

[email protected] March 12th 09 09:28 PM

Yamaha F150 break-in
 
On Mar 12, 4:04*pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.


My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.

John H[_2_] March 12th 09 10:23 PM

Yamaha F150 break-in
 
On Thu, 12 Mar 2009 14:28:32 -0700 (PDT), wrote:

On Mar 12, 4:04*pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.


My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.


Answering your specific question would be difficult for anyone.

The Yamaha computer will know you violated the break-in procedures. If
this is of no concern, go for it.

I followed the procedures with my Yamaha 150, although I did take it
up to about 3500 for perhaps two minutes during my 'test drive'. No
way would I take it to wide open throttle for a 'few minutes'. But, as
to the damage, or lack thereof, who knows?
--
John H

"The democracy will cease to exist when you take away from those
who are willing to work and give to those who would not."
Thomas Jefferson

DK March 13th 09 12:47 AM

Yamaha F150 break-in
 
wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.

My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


None. A few short WOT runs are in order to make sure the motor was
mounted at the right height and the correct prop was installed.

When you reference 2000 and 3000 rpms, you are talking about the max,
right? You should vary your speed during the break in process.


HK March 13th 09 02:13 AM

Yamaha F150 break-in
 
wrote:
On Thu, 12 Mar 2009 20:47:58 -0400, DK wrote:

wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.

My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat

None. A few short WOT runs are in order to make sure the motor was
mounted at the right height and the correct prop was installed.

When you reference 2000 and 3000 rpms, you are talking about the max,
right? You should vary your speed during the break in process.


I didn't know for sure I had the wrong prop on my new engine until
about 10 hours because I wasn't willing to firewall it.
That is why I still have a virtually new 14 7/8 x 15 SS Michigan Match
hubbed for a merc
Anyone want to make me an offer ;-)

I agree you should avoid WOT until it has ruin a while and everything
is seated well. The reality is, if it seems OK it probably is but I
wouldn't do that speed test on purpose for several hours.
.
I am at 2550 or so on the clock and I bet I don't have 60 minutes of
WOT in all of that time. I like 4000-4500 if I am going somewhere. It
just sounds better to me and only takes a few MPH off of my speed, at
a significant fuel saving..




Yamaha publishes performance bulletins for Hydra-Sports. The boat in
question will touch 40 mph at WOT with a 15-1/4 x 15 aluminum prop at
5850 rpm. I have a similar prop (in stainless) on a boat about the same
size and weight, and I can pull 6000 rpms and get a few hairs over 40
mph with the same engine, full fuel, and a few guys and gear aboard.
The Hydra-Sports boat is heavy for its length, just like my Parker. No
lightweight crapola used here. My Parker is a bit heavier, actually.

Therefore, approximately 40 mph will be the WOT full speed with this
boat, motor and prop. The Yamaha performance bulletins are accurate.

I'm sure the Hydra-Sports boat handles well. The manufacturer has been
making the model for some years.

I would not run the boat at WOT outside of the stipulations of the
break-in procedures.




[email protected] March 13th 09 04:18 AM

Yamaha F150 break-in
 
Thanks for the responses.
Forgot about the computer. duh

It does seem wise to be judicious with WOT.
Water test not till 3/21.

I'm gonna by it unless it sinks or doesn't work at the splash.

It's a leftover 2008 model and is priced right.

Wayne.B March 13th 09 06:10 AM

Yamaha F150 break-in
 
On Fri, 13 Mar 2009 01:52:21 -0500, wrote:

On Thu, 12 Mar 2009 21:18:49 -0700 (PDT),
wrote:

Thanks for the responses.
Forgot about the computer. duh

It does seem wise to be judicious with WOT.
Water test not till 3/21.

I'm gonna by it unless it sinks or doesn't work at the splash.

It's a leftover 2008 model and is priced right.


I really think WOT takes time off the life of an engine, particularly
a 4 stroke but that may just be me..


Automotive 4 strokes run at WOT for any length of time have very short
lives. I've been told by a number of people who should know that
3400 to 3600 should be about the max for normal operation, maybe 4000
for outboards.


[email protected] March 13th 09 03:25 PM

Yamaha F150 break-in
 
On Mar 12, 5:28*pm, wrote:
On Mar 12, 4:04*pm, HK wrote:

wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.


My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.


Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......

[email protected] March 13th 09 04:19 PM

Yamaha F150 break-in
 
On Mar 13, 11:25*am, wrote:
On Mar 12, 5:28*pm, wrote:





On Mar 12, 4:04*pm, HK wrote:


wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.


My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.


Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted text -

- Show quoted text -


No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.

HK March 13th 09 04:56 PM

Yamaha F150 break-in
 
wrote:
On Mar 13, 11:25 am, wrote:
On Mar 12, 5:28 pm, wrote:





On Mar 12, 4:04 pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.
My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat
I suggest you follow the directions to the letter.
Thanks for the reply but it doesn't address my question.

Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted text -

- Show quoted text -


No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.



Hmmm. I've been "toying" with the idea of a boat made by Luhrs. I
visited the factory a couple of times when I lived in the St. Augustine
area, and always liked a couple of their lines, though I had heard of
some quality issues.

What was your experience with the quality of your Tournament 320?


[email protected] March 13th 09 05:22 PM

Yamaha F150 break-in
 
On Mar 13, 12:19*pm, wrote:
On Mar 13, 11:25*am, wrote:





On Mar 12, 5:28*pm, wrote:


On Mar 12, 4:04*pm, HK wrote:


wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.


My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.


Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted text -


- Show quoted text -


No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.- Hide quoted text -

- Show quoted text -


Then you know of his fantastic accomplishments!

HK March 13th 09 05:27 PM

Yamaha F150 break-in
 
wrote:
On Fri, 13 Mar 2009 02:10:51 -0400, Wayne.B
wrote:

I really think WOT takes time off the life of an engine, particularly
a 4 stroke but that may just be me..

Automotive 4 strokes run at WOT for any length of time have very short
lives. I've been told by a number of people who should know that
3400 to 3600 should be about the max for normal operation, maybe 4000
for outboards.


4 strokes have come a long way in the last 20 years, mostly because of
the Japs. My Honda Prelude redlines at 7500 RPM and the cam timing
doesn't even advance until you get to 5000 (VTEC). I don't hear that
much either.
I guess I am still just old school ... but I do get a lot of hours out
of my engines.



My Yamaha F150 seems happiest cruising at 4000-4500 rpms. Redlined at
6000 RPM. I've run the engine up to 6000 rpm a few times, but not more
than a few times.

[email protected] March 13th 09 05:38 PM

Yamaha F150 break-in
 
On Mar 13, 12:56*pm, HK wrote:
wrote:
On Mar 13, 11:25 am, wrote:
On Mar 12, 5:28 pm, wrote:


On Mar 12, 4:04 pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with *a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.
My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat
I suggest you follow the directions to the letter.
Thanks for the reply but it doesn't address my question.
Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted text -


- Show quoted text -


No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.


Hmmm. I've been "toying" with the idea of a boat made by Luhrs. I
visited the factory a couple of times when I lived in the St. Augustine
area, and always liked a couple of their lines, though I had heard of
some quality issues.

What was your experience with the quality of your Tournament 320?- Hide quoted text -

- Show quoted text -


It was a good boat.
I had the twin 300 Yanmars and at 1000 hrs had to have the water
jackets cleaned for restrictions. I paid for that. They, Marine Pro,
said I needed to run it harder to keep em clean.
I had an issue with bottom bubbles after 2 years and Luhrs took care
of the total cost.
I had a ZF tranny blow after 20 months,30 miles off Canaveral, tranny
had a warranty 1 year, and Luhrs or ZF repaired it on their dime also.
So excellent customer service and a nice boat for fishing or cruising.
We took it to the Abacos every summer for 5 years and never had a
problem.

Resale value was pretty good.

HK March 13th 09 06:26 PM

Yamaha F150 break-in
 
wrote:
On Mar 13, 12:56 pm, HK wrote:
wrote:
On Mar 13, 11:25 am, wrote:
On Mar 12, 5:28 pm, wrote:
On Mar 12, 4:04 pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle for
more than 5 mins.
My question is; When pre-purchase water testing, how much or little
damage is sustained while the sales guy or I run a new motor at full
throttle for a few minutes to see full speed and other handling
characteristics of the boat
I suggest you follow the directions to the letter.
Thanks for the reply but it doesn't address my question.
Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted text -
- Show quoted text -
No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.

Hmmm. I've been "toying" with the idea of a boat made by Luhrs. I
visited the factory a couple of times when I lived in the St. Augustine
area, and always liked a couple of their lines, though I had heard of
some quality issues.

What was your experience with the quality of your Tournament 320?- Hide quoted text -

- Show quoted text -


It was a good boat.
I had the twin 300 Yanmars and at 1000 hrs had to have the water
jackets cleaned for restrictions. I paid for that. They, Marine Pro,
said I needed to run it harder to keep em clean.
I had an issue with bottom bubbles after 2 years and Luhrs took care
of the total cost.
I had a ZF tranny blow after 20 months,30 miles off Canaveral, tranny
had a warranty 1 year, and Luhrs or ZF repaired it on their dime also.
So excellent customer service and a nice boat for fishing or cruising.
We took it to the Abacos every summer for 5 years and never had a
problem.

Resale value was pretty good.



Good to hear. Bottom blistering was one of the "quality" issues I had
heard about.

Don White March 13th 09 07:34 PM

Yamaha F150 break-in
 

wrote in message
...
On Mar 13, 12:19 pm, wrote:
On Mar 13, 11:25 am, wrote:





On Mar 12, 5:28 pm, wrote:


On Mar 12, 4:04 pm, HK wrote:


wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle
for
more than 5 mins.


My question is; When pre-purchase water testing, how much or
little
damage is sustained while the sales guy or I run a new motor at
full
throttle for a few minutes to see full speed and other handling
characteristics of the boat


I suggest you follow the directions to the letter.


Thanks for the reply but it doesn't address my question.


Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted
text -


- Show quoted text -


No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.-
Hide quoted text -

- Show quoted text -


Then you know of his fantastic accomplishments!

************************************************** ***********

Give it a rest!
This poster knows your silly little game.



DK March 14th 09 01:03 AM

Yamaha F150 break-in
 
Don White wrote:
wrote in message
...
On Mar 13, 12:19 pm, wrote:
On Mar 13, 11:25 am, wrote:





On Mar 12, 5:28 pm, wrote:
On Mar 12, 4:04 pm, HK wrote:
wrote:
I am about to purchase a Hydra-Sports 202DC with a Yamaha F150 4
stroke.
I have read the beak-in procedure.
1hr at 2000 rpm , 1hr at 3000 and the next 8 hrs no full throttle
for
more than 5 mins.
My question is; When pre-purchase water testing, how much or
little
damage is sustained while the sales guy or I run a new motor at
full
throttle for a few minutes to see full speed and other handling
characteristics of the boat
I suggest you follow the directions to the letter.
Thanks for the reply but it doesn't address my question.
Of course not, you've just met Harry. Vague at best because he doesn't
know anything, but wants people to think he knows everything! You do
realize that Harry claims to have a degree in Mechanical Engineering,
don't you? But, he also claims to have a degree from Yale, claims his
wife has two doctor degrees, his father once took a runabout across
the Atlantic in winter and got a fireboat welcome on his return to
NYC, he claims to have owned many, many boats, rounded the horn single
handed, sailed from SF to Hawaii, and on and on......- Hide quoted
text -
- Show quoted text -

No, I didn't just meet Harry. I have never met him, but I have been
lurking here for 10 yrs, posting once or twice a year, while you guys
talk about everything but boats.
I first posted when I bought a new 1999 Luhrs Tournament 320 and Harry
was the first to respond.
Sold that boat 5 years ago and have been using my sisters 33ft
cruiser.
Time for a small boat to play with the grandkids.
This is hardly my first boat or outboard but it is my first 4 stroke.-
Hide quoted text -

- Show quoted text -


Then you know of his fantastic accomplishments!

************************************************** ***********

Give it a rest!
This poster knows your silly little game.



STFU, puppy. Let your master speak for himself.

[email protected] March 14th 09 12:50 PM

Yamaha F150 break-in
 
On Fri, 13 Mar 2009 21:32:18 -0500, wrote:

On Fri, 13 Mar 2009 13:23:43 -0400,
wrote:

4 strokes have come a long way in the last 20 years, mostly because of
the Japs. My Honda Prelude redlines at 7500 RPM and the cam timing
doesn't even advance until you get to 5000 (VTEC). I don't hear that
much either.
I guess I am still just old school ... but I do get a lot of hours out
of my engines.



Back in the 1960's, Honda had a little 50 cc, twin cylinder, DOHC,
race bike that redlined at 20,000 rpm.


Yeah but those were the guys wouldn't't weigh pistons on a triple beam
because it wasn't accurate enough ;-)
We do have to credit the Germans and Japanese for making us change our
engine factories. We were still building the stuff that allowed us to
blow up all their factories. They got a clean start and kicked our
ass. My Merc is a Yamaha powerhead. American foot. Best of both
worlds in my opinion.


Those that keep talking as if 4-strokes are somehow "new technology"
simply because they are mounted on the transom of a boat are pretty
ignorant. If someone said that 4-strokes have come a long way in the
past 100 years, they might be on to something. Most of the
developments are not specific to 4-strokes. Materials, manufacturing
techniques, fuel delivery...






HK March 14th 09 03:29 PM

Yamaha F150 break-in
 
wrote:
On Sat, 14 Mar 2009 08:50:53 -0400,
wrote:

Back in the 1960's, Honda had a little 50 cc, twin cylinder, DOHC,
race bike that redlined at 20,000 rpm.
Yeah but those were the guys wouldn't't weigh pistons on a triple beam
because it wasn't accurate enough ;-)
We do have to credit the Germans and Japanese for making us change our
engine factories. We were still building the stuff that allowed us to
blow up all their factories. They got a clean start and kicked our
ass. My Merc is a Yamaha powerhead. American foot. Best of both
worlds in my opinion.

Those that keep talking as if 4-strokes are somehow "new technology"
simply because they are mounted on the transom of a boat are pretty
ignorant. If someone said that 4-strokes have come a long way in the
past 100 years, they might be on to something. Most of the
developments are not specific to 4-strokes. Materials, manufacturing
techniques, fuel delivery...



The biggest single advancement in 50 years for the 4 stroke was the
overhead cam. That eliminated a lot of valve train hardware.
The real enhancement was the computer control but that has creeped
into 2 stroke design too. EFI is where most of the efficiency and
clean burning came from. They had pretty much squeezed all the juice
out of the carburetor by the end of WWII. Fuel injection was dabbled
with for a couple decades after the war but the systems were pretty
clunky until someone put a closed loop, computer controlled system in
there. Combine that with computer controlled ignition systems and we
really have a well performing engine.
Alas, the ability to fix it on the water (or side of the road) is
compromised.



Compromised? Hehehe. Yeah. That's the ticket. Compromised. Pretty much
eliminated but for the obvious...no spark, loose wire, stuck starter,
something like that. No computer hookup, no special tools, no go.

I don't disagree with your "well-performing engine" comment, but in the
good old days in the 1950s, I had plenty of "well-performing" two stroke
engines that started every time, ran just about all day at WOT, and were
easy to repair without the use of exotic tools or instruments.

[email protected] March 14th 09 04:54 PM

Yamaha F150 break-in
 
On Sat, 14 Mar 2009 11:15:02 -0500, wrote:

On Sat, 14 Mar 2009 08:50:53 -0400,
wrote:

Back in the 1960's, Honda had a little 50 cc, twin cylinder, DOHC,
race bike that redlined at 20,000 rpm.

Yeah but those were the guys wouldn't't weigh pistons on a triple beam
because it wasn't accurate enough ;-)
We do have to credit the Germans and Japanese for making us change our
engine factories. We were still building the stuff that allowed us to
blow up all their factories. They got a clean start and kicked our
ass. My Merc is a Yamaha powerhead. American foot. Best of both
worlds in my opinion.


Those that keep talking as if 4-strokes are somehow "new technology"
simply because they are mounted on the transom of a boat are pretty
ignorant. If someone said that 4-strokes have come a long way in the
past 100 years, they might be on to something. Most of the
developments are not specific to 4-strokes. Materials, manufacturing
techniques, fuel delivery...



The biggest single advancement in 50 years for the 4 stroke was the
overhead cam. That eliminated a lot of valve train hardware.


That was a little more than 50 years ago. They were making engines
with dual overhead cams more like 100 years ago. The rest of the stuff
you list below is not specific to 4-strokes.


The real enhancement was the computer control but that has creeped
into 2 stroke design too. EFI is where most of the efficiency and
clean burning came from. They had pretty much squeezed all the juice
out of the carburetor by the end of WWII. Fuel injection was dabbled
with for a couple decades after the war but the systems were pretty
clunky until someone put a closed loop, computer controlled system in
there. Combine that with computer controlled ignition systems and we
really have a well performing engine.
Alas, the ability to fix it on the water (or side of the road) is
compromised.


Eisboch[_4_] March 14th 09 06:22 PM

Yamaha F150 break-in
 

"HK" wrote in message
...

I don't disagree with your "well-performing engine" comment, but in the
good old days in the 1950s, I had plenty of "well-performing" two stroke
engines that started every time, ran just about all day at WOT, and were
easy to repair without the use of exotic tools or instruments.


And if you got lost, you simply turned around and followed your oil slick
back to port.

Eisboch


HK March 14th 09 07:09 PM

Yamaha F150 break-in
 
Eisboch wrote:

"HK" wrote in message
...

I don't disagree with your "well-performing engine" comment, but in
the good old days in the 1950s, I had plenty of "well-performing" two
stroke engines that started every time, ran just about all day at WOT,
and were easy to repair without the use of exotic tools or instruments.


And if you got lost, you simply turned around and followed your oil
slick back to port.

Eisboch


I suppose I could have done that, but in LI Sound, you could see both
shorelines... :)

Eisboch[_4_] March 14th 09 07:44 PM

Yamaha F150 break-in
 

"HK" wrote in message
m...
Eisboch wrote:

"HK" wrote in message
...

I don't disagree with your "well-performing engine" comment, but in the
good old days in the 1950s, I had plenty of "well-performing" two stroke
engines that started every time, ran just about all day at WOT, and were
easy to repair without the use of exotic tools or instruments.


And if you got lost, you simply turned around and followed your oil slick
back to port.

Eisboch


I suppose I could have done that, but in LI Sound, you could see both
shorelines... :)


I am thinking back to my youth spending summers on a small lake. We all had
big old Merc, Johnson and Evinrude 2 strokes on our boats that left an oil
slick whenever the leg was in the water, running or not.

The EPA would have a field day now-a-days.

Eisboch



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