saw this one coming.this whole thing sucks.

F79 said....I guess 4* retarded would have that exhaust valve closing later, increasing the reversion risk....


That's right F79. In my .02, installing them at the designed ICL is usually best. If the evc ground into the cam is one that will revert its better to just get a cam that is ground for marine use and that will not revert as opposed to adjusting the icl. Hopefully your guy didnt do that. None the less, I'd be livid about him not using the cam I specified. Bad biz right there from what you describe.

Yup, time for the builder to man up and change it. That cam sucks (in the literal aspect) for a blower motor. 79F, you will have to be assertive here (not an *******) but the builder is not going to like it.

EVC isnt the end all be all of determining reversion but it has a significant impact. Curious, I looked up the EVC of the cam you speced vs the one installed. The one installed has an evc angle of 30* atdc at .005 lift and the one you speced 39* at .006 lift. The one you speced in theory should revert more than the one installed, strictly based on evc. I'd still be pissed but would let it ride and watch for signs of reversion. The builder most likely isnt going to get on board with swapping it out anyway and it'll just turn into a pissing match. I'd never go to his shop again though and I'd let him know that and the reason why.

Try to find some common ground before you install this in your boat like you get the engine builder to agree that if the engine grenades due to reversion that he foots the bill or something along those lines. You are in a tough spot right now because there is a lot of good advice being given here and your engine builder is probably pretty good at what he does too. The fact is you are not getting a warm fuzzy feeling and the end results could cost you a lot of $$$. Good Luck.

The lobe separation seems wrong for a blower motor too. Comp suggested a few cams that will work. None of them were on a 110lsa. The builder is an hour away. For a $146 cam, it might be cheaper to buy it and swap it myself.

Why let him off the hook? You specified what you wanted now have him follow thru. I highly doubt he will cover this engine if it goes boom reversion related or not.

Good luck and let us know how it turns out

Steve called me back. He said buy whatever cam I want. Bring it in. He will refund me the cam that is already in it. He will swap it no problem. Very happy right now!

Chances are he got a really good deal on a bunch of these cams. Good to hear he's going to work with you on this. That's what we like to hear.

Didn't he charge you extra for the cam already? Thought the original quote was $2300 and you wound up around $3200?