Compression on Merc. 1988 330hp 454??
06-15-2004, 11:35 AM
#1
Registered
Thread Starter
Compression on Merc. 1988 330hp 454??
Help!!
My brother-in-law has to do a compression test on a boat he sold as a request of the buyer. What should it read??
I told him, I thought about 130lbs. but as long as they are all about the same it will be OK....right???
Thanks!!
Brad
My brother-in-law has to do a compression test on a boat he sold as a request of the buyer. What should it read??
I told him, I thought about 130lbs. but as long as they are all about the same it will be OK....right???
Thanks!!
Brad
Last edited by FunHome; 06-15-2004 at 12:07 PM.
06-15-2004, 01:25 PM
#4
Gold Member
Gold Member
Re: Compression on Merc. 1988 330hp 454??
A solid motor won't deviate more than 5psi per cylinder, a leak down test in my opinion is a much better way to verify an engines cylinder sealing capabilites. FYI :Believe it or not an engine only needs about 60psi to run.
