Input on engine condition please

[pigpen]

I just opened my flywheel cover up to pull the the flywheel and stator and found some dark residue behind it. When these are installed with the bendix is there a grease that is used that coulda got flung around in there? I just wanna make sure it's not a crank seal leaking. The residue is very thick and doesn't really have a smell to it.

Does the darker colored piston mean the front cyl. Was running lean? Just don't wanna install this in my ski if it needs seals. Also with the cyl. At TDC should there be a small amount of side to side play between the piston and the cylinder wall?

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[kevbo]

The seal spooge is normal. The dark cyl is running hotter, open the top screw 1/4-1/2 turn or up the main one size.

 

[pigpen]

Good to hear, what about the piston side to side play? Normal?

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[Harbor]

Yes it's normal to be able to push the piston side to side

 

[pigpen]

Yes it's normal to be able to push the piston side to side

Thanks, I was just worried when I was able to wiggle it around I tiny bit, should it only be able to go side to side though?

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[Harbor]

Yes side to side in all directions but only rock on the intake side and the exhaust side

 

[pigpen]

Good info, appreciate it!

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[BruceSki]

Your rear cylinder looks rich to me. You have zero piston wash.

 

[pigpen]

The darker piston? I also wiped them down a bit when I opened it. Supposedly the motor has 15-20hrs on it.

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[BruceSki]

No the super clean piston is rich. When they are very rich it will clean the piston off til it's spotless like that. Front piston is pretty close to where it should be

 

[pigpen]

So I need to lean out the rear cylinder a bit like kevbo was saying?

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[BruceSki]

Kevbo suggested richening up the front cylinder, I suggested leaning out the rear a bit.

A plug chop and proper tuning on the water is the only way to do it right though.

 

[pigpen]

I'm a newbie when it comes to tuning, what's a plug chop lol?

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[BruceSki]

Hold the ski wide open for 15-20 seconds then hit the stop button while holding the throttle wide open.

Pull the plugs and visually inspect for color. Should be chocolate chip cookie brown.

Too white is lean, black is rich.

 

[pigpen]

Gotcha, should I just do it with the ski on the trailer backed in the water?

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[BruceSki]

You can get it close by ear that way, but it won't be as good as riding it and doing a plug chop.

 

[pigpen]

Alright when I get it all together I will get it out and do that, thanks for the info!

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[augustaf]

When doing your high speed run, you have to (!) shut the engine down and coast to shore without idling, otherwise your plugs might not show an accurate pic.

 

[john zigler]

Read up on a leak down test. It is NOT hard to perform, and will tell you the condition on your crank seals, etc and show if you have an air leak. I can provide a complete kit for you if you need.

 

[pigpen]

I think I'm gonna do a leakdown once the motor is reassembled just to be sure.

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