New Piston for '87 90hp

[hayuuga]

Re: New Piston for '87 90hp

Hi
After rebuild You better back of 3 to 4 ? on the timing. and adjust prop to rev 5800 to 6000rpm to reduce internal engine heat.
the piston has a severe heat damage and the ringland are knocket away.
Ive been there 2.
best regards

David

 

[blimp]

Re: New Piston for '87 90hp

welp i got it back together:

http://www.youtube.com/watch?v=Rh4yHD0V2vY

Heading out to the lake today, running double oil, going to break it in properly. Idles much better than before, I have a feeling its been running on less than 4 cyl since i got it a few months ago.

Thanks again for the help and suggestions, I am going to back off the timing a bit and see what rpm she reaches after a few hours of break in.