On Thu, 14 Aug 2008 18:11:10 -0500, Brian Whatcott
wrote:

On Tue, 12 Aug 2008 23:18:41 GMT, (Richard
Casady) wrote:

On Sun, 10 Aug 2008 21:15:18 -0500, Brian Whatcott
wrote:

matching prop pitch to desired cruise
speed is almost a black-art....

I though you gave it enough pitch just reach maximum rated RPM at WOT.

Casady

If you pitch a prop like this for a full laden boat - it can be dicey
with a light laden boat, don't you think?

Not really You can overrev the engine with a light load, but you dont
have too. Its just that WOT is not available with a very light load.

On Thu, 14 Aug 2008 18:11:10 -0500, Brian Whatcott
wrote:


If you pitch a prop like this for a full laden boat - it can be dicey
with a light laden boat, don't you think?

The engine will turn more revs than redline at WOT

Brian W

On 2008-08-10 22:10:55 -0400, "Chuck" said:

"Chuck" wrote in message
news:5TSck.244293$yE1.55866@attbi_s21...
I have a Merc 60 Bigfoot, 3-cyl outboard fitted with NGK BP8H-N-10
plugs. I think my plugs look too "wet" much like the third one shown in
the photo on the NGK website.
http://www.ngksparkplugs.com/techinf...200&country=US

Although

the motor runs pretty smoothly. I running with a 130 degree
thermostat. What should I look at adjusting?

Chuck
Doesn't anybody want to know what the problem turned out to be?

scroll down................


down more..............................


Remember its a 60hp motor on a 24ft pontoon party boat. On the fourth
of July I had 14 people on it and THAT was the reason it felt so
sluggish and caused me to check the plugs, which is when I noticed they
were "wet." When I have a few people on the boat it cruises easily at
twenty knots. Yeah.... don't anybody say it......... go ahead..........

I won't, but thanks for the chuckle.

--
Jere Lull
Xan-à-Deux -- Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/

Many engines are normally 'overfueled' so that the combustion chambers
get some affect of cooling by the excess fuel flow through. Also if
you were running with a heavy load and were thus 'lugging' the engine
(not able to reach full rpm) youll also get some wetness on the walls,
piston tops, etc. due to the unburned fuel because the engine isnt
running a 'top efficiency'.

wrote in message
...
On Tue, 08 Jul 2008 23:37:37 GMT, "Chuck" wrote:

I have a Merc 60 Bigfoot, 3-cyl outboard fitted with NGK BP8H-N-10 plugs.
I
think my plugs look too "wet" much like the third one shown in the photo
on
the NGK website.
http://www.ngksparkplugs.com/techinf...200&country=US

Although the motor runs pretty smoothly. I running with a 130 degree
thermostat. What should I look at adjusting?

Chuck


Before I got crazy and tried to "fix" a motor that was running well I
would ask, how far did you have to idle back to the ramp before you
pulled these plugs?
If this is running well other the entire range I might try a little
hotter plug, if it is loading up when you idle you could play with the
idle screws a little but be careful you don't break it.

I see your point about the idling...... it took me at least 10 minutes
running at idle rpm. I never thought of that. BTW, this is an automatic
oil injection system and so I cant adjust the fuel/oil mixture ratio.

"Chuck" wrote in message
news:v_2dk.190760$TT4.166948@attbi_s22...

wrote in message
...
On Tue, 08 Jul 2008 23:37:37 GMT, "Chuck" wrote:

I have a Merc 60 Bigfoot, 3-cyl outboard fitted with NGK BP8H-N-10 plugs.
I
think my plugs look too "wet" much like the third one shown in the photo
on
the NGK website.
http://www.ngksparkplugs.com/techinf...200&country=US

Although the motor runs pretty smoothly. I running with a 130 degree
thermostat. What should I look at adjusting?

Chuck


Before I got crazy and tried to "fix" a motor that was running well I
would ask, how far did you have to idle back to the ramp before you
pulled these plugs?
If this is running well other the entire range I might try a little
hotter plug, if it is loading up when you idle you could play with the
idle screws a little but be careful you don't break it.

I see your point about the idling...... it took me at least 10 minutes
running at idle rpm. I never thought of that. BTW, this is an automatic
oil injection system and so I cant adjust the fuel/oil mixture ratio.
To check the plugs you need to run at a cruising speed and then shutdown,
pull the plugs and take a look at them. Idling around for anytime is going
to load them up on a 2 stroke.

"jamesgangnc" wrote in message
m...
"Chuck" wrote in message
news:v_2dk.190760$TT4.166948@attbi_s22...

wrote in message
...
On Tue, 08 Jul 2008 23:37:37 GMT, "Chuck" wrote:

I have a Merc 60 Bigfoot, 3-cyl outboard fitted with NGK BP8H-N-10
plugs. I
think my plugs look too "wet" much like the third one shown in the photo
on
the NGK website.
http://www.ngksparkplugs.com/techinf...200&country=US

Although the motor runs pretty smoothly. I running with a 130 degree
thermostat. What should I look at adjusting?

Chuck


Before I got crazy and tried to "fix" a motor that was running well I
would ask, how far did you have to idle back to the ramp before you
pulled these plugs?
If this is running well other the entire range I might try a little
hotter plug, if it is loading up when you idle you could play with the
idle screws a little but be careful you don't break it.

I see your point about the idling...... it took me at least 10 minutes
running at idle rpm. I never thought of that. BTW, this is an automatic
oil injection system and so I cant adjust the fuel/oil mixture ratio.
To check the plugs you need to run at a cruising speed and then shutdown,
pull the plugs and take a look at them. Idling around for anytime is
going to load them up on a 2 stroke.

Excellent. That's what I didn't know. I am going to run her a bit and then
refill with fresh fuel which should get me back to running like last year.
Thanks.

On Wed, 9 Jul 2008 09:37:26 -0400, "jamesgangnc"
wrote:


To check the plugs you need to run at a cruising speed and then shutdown,
pull the plugs and take a look at them. Idling around for anytime is going
to load them up on a 2 stroke.

Any caution here about letting the heads cool down?
They're aluminum, right?

--Vic

On Wed, 09 Jul 2008 20:59:28 -0400, wrote:

On Wed, 09 Jul 2008 11:13:56 -0500, Vic Smith
wrote:

To check the plugs you need to run at a cruising speed and then shutdown,
pull the plugs and take a look at them. Idling around for anytime is going
to load them up on a 2 stroke.

Any caution here about letting the heads cool down?
They're aluminum, right?

--

Bass boats run flat out, then shut down fast all the time. The heads
seem fine

I meant to say pulling plugs from a hot aluminum head.
I stretched some threads doing that once.
Thereafter there was no more screwing them in easily by hand.
Might be a head can cool faster than a plug too.
In any case it's better to let the whole shebang cool off to near
ambient, which is what I always do now.

--Vic