Re: 3.0L merc efi
 

im going to talk to a mech tomorrow about it. im hoping that i can pay him for some of his time and he will help me put it back together. he loves merc and has a shop full of tower of powers.

Re: 3.0L merc efi
 

Evan,
It seems very strange to me that a piston can go thru a cycle and not put say 30 or 20 on a dial. If it`s the no 1 maybe a crank shear? Not trying to be doom n gloom here.

Re: 3.0L merc efi
 

i know. maybe i need to inspect the head a little better. maybe head gasket is destroyed? im still hoping nothing serious because all the pistons move.

Re: 3.0L merc efi
 

Ok that was a dumb thought. If all the slugs are moving how do you get no comp. #?

Re: 3.0L merc efi
 

I feel the comp # should register if you have any crank # if not sheared.
I`ll be pulling my PH next week and let you know how things go. I love twisting and learning.

Cheers and let me know if I can help,
GFS

Re: 3.0L merc efi
 

Even with no rings you would still get something on the dial. I paid $300 / $50 per hole 4 years ago. Went 20 over. I put about $2000 in it including bearings.

Re: 3.0L merc efi
 

I take that back. I did a little experiment. It takes 30 psi to open the valve stem in my compression gauge. You probably have compression just not enough to open the valve stem on your gauge.

Re: 3.0L merc efi
 

what did you put in it for 2k? i want to try to reuse the crank and rods probably. just pistons bearings ans=d gaskets and those reeds esd was talking about and remove oil injection.

Re: 3.0L merc efi
 

Machine work, pistons/wrist pins , rings, bearings, gasket/seal kit including gear case and a decal kit ($150). Crank was good. I also had another couple hundred bucks in tool purchases on top of that $2000.

Re: 3.0L merc efi
 

well i just got back from talking to the mech. i trust this guy and i like his work but he said it would be between $3500-$4000 to rebuild it with a warranty for 1 year. i think ill save some money and do it myself.

i also called chris carson marine by ESD reccomendation and they seem to be the way to go right now. $3200 with 1 year full warranty and 2nd year half and half. they will give it 15 more hp with a turn around of 1 week. he said im lookin at about 2K just in parts. doesnt seem like a bad deal to me.