2 or 4 stroke
 

Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).

Duh, where have you been looking? 2 strokes are most certainly
available.

The 4-stroke will give you noticeably better fuel consumption, is a lot
quieter and generally more reliable. The down side is that they are
heavier. That can make a big difference in a dinghy motor but not a lot
when you get above 25HP.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

wrote in message
ups.com...
Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).

2 strokes ae readily available in models that are a couple years old.
These may be a good deal if still under warranty.

Considering the hassles of how a 4 stroke cannot be tilted some ways,
how reliable are they compared to a 2 stroke?
How expensive to repair compared to a 2 stroke?
Considering a cost differential of about $1000 (US), is fuel economy a
real consideration for a 4 stroke?

Lew Hodgett wrote:
Since the gov't got involved, 2 stroke is no longer available, so it is
a no brainer.

Duh Lew, I helped put the government in place and so did you if you
voted. Since private industry will never do the socially responsible
thing unless forced by law, and since most consumers are as dumb as
posts, it takes the government to shall we say, guide the stupid to the
correct answers. In this case, outlawing two-stroke engines. Of course
it could just be that I'm all wrong and allowing 1 out of every 5
gallons of gas passing through my two-stroke to go straight into the
lakes un-combusted is really an okay thing for us to be doing.

I understand the newer 2 strokes are fairly clean.

prodigal1 wrote:


Duh Lew, I helped put the government in place and so did you if you
voted. Since private industry will never do the socially responsible
thing unless forced by law, and since most consumers are as dumb as
posts, it takes the government to shall we say, guide the stupid to the
correct answers. In this case, outlawing two-stroke engines. Of course
it could just be that I'm all wrong and allowing 1 out of every 5
gallons of gas passing through my two-stroke to go straight into the
lakes un-combusted is really an okay thing for us to be doing.

You want an argument, change the subject.

Lew

In article ,
Dave wrote:
On Mon, 18 Jul 2005 10:59:24 -0400, prodigal1 said:

Since private industry will never do the socially responsible
thing unless forced by law, and since most consumers are as dumb as
posts, it takes the government to shall we say, guide the stupid to the
correct answers.

Ah, those dumb consumers. We surely need a gaggle of wise guvmint
bureaucrats to make all our decisions for us.

How about a gaggle of intelligent, dedicated people who are looking
out for the common good... but that's against your philosophy, right?



--
Jonathan Ganz (j gan z @ $ail no w.c=o=m)
http://www.sailnow.com
"If there's no wind, row."

"Jonathan Ganz" wrote in message
How about a gaggle of intelligent, dedicated people who are looking
out for the common good... but that's against your philosophy, right?

The common good... Interestingly, that's a communist philosophy. Or
perhaps, more recently, Al Quaida. Personally, I don't need you, or any
other racial to advocate your preferences on anything.

I asked about outboard motors and yur talkin Al Queda. Y'all go git a
room somehwere.

Yes, far away. If you go really far, I will underwrite the room.

In article . com,
wrote:

2 strokes ae readily available in models that are a couple years old.
These may be a good deal if still under warranty.

Considering the hassles of how a 4 stroke cannot be tilted some ways,
how reliable are they compared to a 2 stroke?
How expensive to repair compared to a 2 stroke?
Considering a cost differential of about $1000 (US), is fuel economy a
real consideration for a 4 stroke?

Everything that I've seen, heard, and experienced points towards the
4-strokes. The newest two-strokes aren't as bad as the old, but they're
as complex as the 4-strokes and seem to need more maintenance.

A couple of years ago, a rental or charter operation in the Keys
detailed the benefits over the long term in his fleet of small boats in
this newsgroup. One of the unusual benefits I recall was that the
4-strokes lasted at least twice as long -- same boats, same use.

Two strokes have a lot of benefits, but if two stroke technology were
truly as clean and efficient as four strokes, I would expect to see
automobiles switch over, particularly the smallest econoboxes.

The only sorta two-stroke I can think of is the Mazda RX-8 rotary. Now,
THAT's an engine that gives outstanding power to weight! Are there any
rotary outboards?

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/

WaIIy wrote:

Geez, you're an arrogant sonofabitch.

Okay Wally evidently I hit a nerve.
Are you offended because you're a private business person who won't
behave in a socially responsible fashion or a consumer who is as dumb as
a post? Or perhaps you're one those I see posting complaints about the
"guvmint" as if it were some entity that we voters had nothing
whatsoever to do with putting in place?
I guess none of those three options give you much to work with eh?

:

2 strokes ae readily available in models that are a couple years old.
These may be a good deal if still under warranty.

Make sure you see it work first.

Considering the hassles of how a 4 stroke cannot be tilted some ways,
how reliable are they compared to a 2 stroke?

Both of my two stroke motors need servicing about every two years each. Not
major repairs, but they always seemed to act up just when I really want to
relax, never when I was going to the cabin to work and expected to be going
in-town anyway.

How expensive to repair compared to a 2 stroke?

Never needed to service the two and half year old four stroke, so I can't say.

Considering a cost differential of about $1000 (US), is fuel economy a
real consideration for a 4 stroke?

Oh boy is it. The Johnson two stroke just guzzled gas.

Also you always was having to watch the oil was mixed properly. I lent the
Johnston to my brother and he mixed it too rich 20-1, boy did it smoke. But
to make it worse he also put the mixed gas into my Honda generator.

That was the point when I decide to go all 4 stroke and no mixed gas. Infact
I am not completely converted, I am using eletric motors on my small lake to
get around, but if I buy a gas motor it will be four stroke.

Earl Colby Pottinger

--
I make public email sent to me! Hydrogen Peroxide Rockets, OpenBeos,
SerialTransfer 3.0, RAMDISK, BoatBuilding, DIY TabletPC. What happened to
the time? http://webhome.idirect.com/~earlcp

In article ,
lid (Jonathan Ganz) wrote:

In article ,
Dave wrote:
On Mon, 18 Jul 2005 10:59:24 -0400, prodigal1 said:

Since private industry will never do the socially responsible
thing unless forced by law, and since most consumers are as dumb as
posts, it takes the government to shall we say, guide the stupid to the
correct answers.

Ah, those dumb consumers. We surely need a gaggle of wise guvmint
bureaucrats to make all our decisions for us.

How about a gaggle of intelligent, dedicated people who are looking
out for the common good... but that's against your philosophy, right?

Intelligence is an individual trait...... When two or more "Intelligent"
people get together, their combined intelligence decreases
expotentionally, by the total number in the group. Governments are made
up of such groups, and their combined Intelligence is infinitessimal....
It has always been this way..... and most folks understand this
outright....


Me who lives far enough out, to not be disturbed by
the above facts.... in any case.....

I neglected to mention that I am limited to an engine under 300 lbs

As you might have read in another posting of mine, 4-strokes give better fuel economy
than 2-strokes because the low speed jet on a 4-stroke is very small and only allows
the minimal required fuel through it. The down side, as I mentioned before, is that
this tiny jet is more subject to clogging. This latter problem can be overcome by
proper maintenance, which includes not leaving gas sit for long periods in the carburator.
Certainly all the newer gasolines with additives don't help. Yamaha recommends not
using gasohol, but it's almost impossible to avoid it.

Sherwin D.


wrote:

Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).

Are the 4 strokes quieter?
"sherwindu" wrote in message
...
As you might have read in another posting of mine, 4-strokes give better
fuel economy
than 2-strokes because the low speed jet on a 4-stroke is very small and
only allows
the minimal required fuel through it. The down side, as I mentioned
before, is that
this tiny jet is more subject to clogging. This latter problem can be
overcome by
proper maintenance, which includes not leaving gas sit for long periods in
the carburator.
Certainly all the newer gasolines with additives don't help. Yamaha
recommends not
using gasohol, but it's almost impossible to avoid it.

Sherwin D.


wrote:

Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).

I have owned a few 2-strokes, a British Seagull (the noisiest, yet a great pusher) and
a Chrysler 7.5. My Yamaha 9.9 4-stroke is definitely smoother and quieter than
the two I mentioned.

Sherwin D.

MMC wrote:

Are the 4 strokes quieter?
"sherwindu" wrote in message
...
As you might have read in another posting of mine, 4-strokes give better
fuel economy
than 2-strokes because the low speed jet on a 4-stroke is very small and
only allows
the minimal required fuel through it. The down side, as I mentioned
before, is that
this tiny jet is more subject to clogging. This latter problem can be
overcome by
proper maintenance, which includes not leaving gas sit for long periods in
the carburator.
Certainly all the newer gasolines with additives don't help. Yamaha
recommends not
using gasohol, but it's almost impossible to avoid it.

Sherwin D.


wrote:

Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).