Burnt a piston on 455 Rancher?

[Coldfront]

How hard is it to put a new piston in a 455 Rancher? My friends saw burnt a piston, the cylinder looks like I can hone it out, just looking thru the spark plug hole. The saw is 5 years old so he doesn't want to spend to much money on it. I never took one apart before, it doesn't look like it should be too bad. Any suggestions before I tear into it? btw he thinks he screwed up on the oil mixture. The spark plug has aluminum on it and I can see where a hole was starting to burn through the piston.

 

[darren_nh]

Try the chainsaw forum. You will get faster response on this there.

 

[jeeptj19992001]

you can not tell anything by looking through the spark plug hole, not hard to replace, baileys sells them.

 

[ericjeeper]

First thing you need to do....

Is figure out what caused the burn down.. Leaking seals? Or neglected air filter.Or worse yet straight gas.

 

[husky455rancher]

he said he thinks he screwed up the oil mixture. i might take a flamin for this but if its just a little wear and not a hole then id rering hone and let here rip. i ran a piston like that for 2 seasons on my old balster that was modified to the hills and i never had a problem. just make sure the mixture is dead on from now on.

 

[Coldfront]

He thinks he went to light on the oil/gas mix. I will try to take it apart tonight, a piston and rings looks like about $85 and I was told you can usually reuse the gasket if you put some permetex weather strip sealant on it. Thats what the local Husky mechanic told me anyway.

 

[laynes69]

Did you do a compression test?

 

[Coldfront]

Did you do a compression test?

I will after I hone the cylinder and put in a new piston, just for a reference. i could see that the cylinder was scored pretty good but I think I can hone it out. It didn't have enough compression to start, and when I saw the spark plug I saw all I needed to see.