96 xp motor locked up tonight what caused this? see pics!

[hermie]

what caused this?

to lean?
oil pump?
overheating?

the pic of the bad cylinder is the pto cylinder
pto

other cylinder

Thanks for the help

 

[riverrat88]

How do the rave valves look?

 

[6KJR]

Looks like a lean condition. When was the last time you checked your plugs? Or rebuilt the carbs.

 

[hermie]

I haven't taken the cylinder off yet but we think he piston skirt broke and that crud is the aluminum shavings that got sucked in and melted. Sounds like there is still some broken skirt under the piston.



what do you guy think on that ??

I am pulling it apart and I'll let u know what I find

 

[hermie]

ok what I guessed happened did happen

all that crud was melted aluminum from a broken skirt

cylinder didn't look to bad till I saw a piece of its skirt is missing

 

[timmyboy76]

wow man....like the other post said, inspect the raves and if good, then i'd look at the injection fittings on the RV cover..

 

[6KJR]

That cylinder got hot. Do you run premix? I might suggest that, and also monitor your octane of fuel and do a carb inspection/service/rebuild...

My brother said from looking at the pics.. Oil mixture/pump failure.