Re: 97 z222 5.7L RPM advise
 

Fuel filter is new. I have yet to check flame arrestor but will do that tonight. Thanks!

Re: 97 z222 5.7L RPM advise
 

Bad news..dead cylinder. No compression!

Re: 97 z222 5.7L RPM advise
 

Sorry to hear that RX41761. I hope you can get her back up and running for next season. Assuming everything else is in working order a short block can be had for around $2500.

Re: 97 z222 5.7L RPM advise
 

The guy i bought it from is a stand-up guy! He is taking it back and rebuilding for me at no charge. He works at a marina. Can't beat that!

Re: 97 z222 5.7L RPM advise
 

Wow, that is awesome! Can't beat a rebuilt motor in your Mariah.

Re: 97 z222 5.7L RPM advise
 

Well the picture simply shows a spark plug that has been shorted out. No compression or just no combustion on one cylinder? Are you sure it's not as simple as new plugs or did they do a compression check and find a bigger problem ?

In any case if they fix it for you that's a good thing.

Re: 97 z222 5.7L RPM advise
 

I checked compression myself. Also finger over plug hole very little pressure.

Re: 97 z222 5.7L RPM advise
 

OK, how it was not obvious that motor was running with a dead cylinder surprises me.

Good luck with the repair I hope you get back to full power.

Re: 97 z222 5.7L RPM advise
 

It ran surprisingly good. It was the oil leak and rpm that led me to this.

Re: 97 z222 5.7L RPM advise
 

I hesitate to say this but... if that plug was installed with a crushed electrode, that may have killed that cylinder. If raw fuel was accumulating with no combustion and wiping the cylinder walls it'll do that.