piston and cylinder destroyed photos what now ?

[Jvislawncare]

Got the head off today and found cylinder 2 piston trashed and head has serious pitting , wave eater clips installed so how did this happen ? Looks as though Pv area was impacted , now from photos how much parts am I looking at ? Piston moves as it should but what about all the metal pieces ? Lol

[silver93t]

It is still possible for the power valve to fall down even with the clips. I would contact Mike at pwcengines.com. He has always been fair with me.

[mod addict]

The ring land could of been impacted by detonation.

[WFO]

ring spun around and hooked the exhaust port

debris from ring pounded the top of the piston

[Jvislawncare]

How does does this happen running lean ? So bottom should be fine u think new diaphragms in carb new piston head and cylinder and piston and I should be good to go ?

ring spun around and hooked the exhaust port

debris from ring pounded the top of the piston

[WFO]

Usually happens from a lot of hours on motor, and piston alignment pin fails causing the ring to rotate around and catch the port. I would tear it all down and inspect. Crank may have debris from the damage

[Jvislawncare]

Should I replace cylinder it's used or send out to bore out and sleev

[WFO]

needs to be replaced... whether getting a used one or send it out for repair

[Jvislawncare]

What should I do about the other cylinders ? While I am in there already ? Obviously Ill have to take the exhaust apart to get to everything , anything I should change to prevent any more damage ski had 160 hrs
QUOTE=WFO;2387558]needs to be replaced... whether getting a used one or send it out for repair[/QUOTE]

[Jvislawncare]

Update ... Removed engine from ski this is the piston damage that I found , no metal pieces in crank that I can see and appears to be fine , pre mix ski had oil lines blocked off but oil line in this cylinder had slid off ???? Issue ? , lean condition or to many hrs on ski ? 164hrs