951di Grey sludge after water ingress, do I need to change counter balance shaft oil?

[Shaunmac]

Hi folks,
Unfortunately, I managed to get water in my Seadoo 951 di engine. After much hassle cleaning plugs 30+ times, I've managed to get the engine started!

There was a lot of grey sludge in the crank case that kept on fouling the plugs, would that have been 2-stroke oil & water, or gear oil & water?

Is the counter balance shaft isolated from the crank / crank case? Or does the oil now need to be changed?

Any help would be really great, thanks!

 

[statikuz]

As far as I understand it, if all your bottom end seals are intact, the counterbalance shaft is isolated from the rest of the crankcase. I would think your sludge is engine oil and water. Here's what it looks like inside.

 

[Shaunmac]

Well that's a relief, thanks!

I might check it anyway as it's done just over 200hrs. It was rebuilt some time back but it was likely just the top end.

 

[Shaunmac]

Just one thing, why would there be engine oil in the crankcase of a 2 stroke? Surely there should only be 2 stroke oil in there?

By engine oil, I mean 4 stroke petrol engine oil .

Cheers

 

[mikidymac]

No, there is no crankcase oil in a 2-stroke.
Your balancer shaft does have separate oil and should be changed.

 

[Shaunmac]

No, there is no crankcase oil in a 2-stroke.
Your balancer shaft does have separate oil and should be changed.

I can't imagine what that grey sludge was then, it was thick like oil & kept coming up from the inlet & crank (I think!).

 

[jhjesse]

Soot build up in the exhaust. Water cleaned it out.

 

[noviceskier]

Same thing occurred when my kawi ingested some water, ran fine and no problems during the entire season.