Compression high's and low's

[DryDock]

Yet more questions!
My 1994 SL750 has 125 psi in all three heads.
Is this high for a craft with 184 hours on it?
Could carbon buildup be the cause of the #'s?
If it was at... say 100 psi but equal in all, would this be a good indicator of "rebuild time"?
And one more... well two, is it a good idea, to spray a carbon remover into the carbs to help remove build up?
And last one! Should we use a new post for each new Question?
DryDoc

[Technical Support]

Re: Compression high's and low's

DO NOT spray ANY 'cleaners' into a 2 stroke unless you want an immediate scrap engine!


125 is stock. If you had a 10% drop it would be time to rebuild.

Carbon buildup is not an issue with PWCs at all. Compression does not go up with time, it drops after damage.

[DryDock]

Re: Compression high's and low's

Thanks for your input!

DryDock

[DryDock]

Re: Compression high's and low's

Is foging spray a type of cleaner,water remover/fine oil?

just not as harsh?
Thanks
DryDock

[Technical Support]

Re: Compression high's and low's

Completely the opposite - who told you oils are 'harsh'??

[1fastski.com]

Re: Compression high's and low's

motor tuner for outboards works very well to keep carbon from forming and sticking rings , it should be used in the spring startup . also cleans raves and power valves :-) its a cleaner that is also a lube so you will not damage anything . i have used it for years it works great . its also for 4 strokes .

[ShowMePro1200]

Re: Compression high's and low's

Anyone familiar with and/or used "SeaFoam"? Plusses/minuses on this product? The can says its ok for 2-cycles and 4-cycles both.

Just seems like if you could use something that would prevent possible varnish buildup in the carbs you could run them a lot longer (of course if dirt gets in you're rebuilding anyway).

[Polaris_Nut#1]

Re: Compression high's and low's

Polaris has a carbon cleaner fuel additive that you mix one bottle to a full fuel tank if you are worried about carbon build up. A cap full in an old weed wacker is like giving it a tune up.

I have been putting fuel stablizer in my 1995 SL750 at the end of every season since 1995. I change my fuel filter every other year and I have never had to rebuild or clean my carbs yet. I just ride it with the stablizer and top the tank off so there is less room for air and condensation in the tank.

From what I hear I'm lucky my fuel gage lasted 9 years, Now I have to fix it!

I changed my MFD back when it was under warranty but I figure it has about 235 hours on the bottom end of the motor. A head gasket problem a few years back lead me to replacing the top end.

[DryDock]

Re: Compression high's and low's

Thanks for the replys

DryDock