Originally Posted by bobl (Post 3786757)

Merc 6.2's use 5.7 rods & hyper pistons. Scorpions do also. Yes, 6.0 rods give a better rod angle and of course forged pistons are better, but for his application this build should work fine. I don't think you're far off on your build, just don't want to spin it to high RPM. No way should that cam cause reversion, even with stock exhaust. If I remember from our conversation, you have a Mefi 3 computer so tuning is not a problem. Just for the record I can dyno the engine in or out of the boat, with full wet exhaust. I also have a riser for the stainless exhaust with an 02 bung. If you opt for the EMIs be sure and get an 02 bung welded in.

Bob Lloyd
Full Throttle Marine

Originally Posted by Diego9040 (Post 3787131)

I will pretty much the same set up (carb ) (bob Madara cam) , would I be ok revving up to 5200 rpm?

Originally Posted by 01scarab29 (Post 3787730)

The numbers on the back of the ECM is 16236999 and according to Marine Power Service its a MEFI-3 (for marine use). Was told it can be reprogramed with no problem. So what do you think ? Am I still ok.

Originally Posted by spectras only (Post 3787188)

FWIW, I have two 6.2's [ 2003 engines] with Smart Craft in my boat with over 200hrs. Mercrusier set the rev limiter at 5150. Dustin Whipple could probably raise the ECM555's limit to 5300 and the engine would still be safe.JMO

Originally Posted by 01scarab29 (Post 3787730)

The numbers on the back of the ECM is 16236999 and according to Marine Power Service its a MEFI-3 (for marine use). Was told it can be reprogramed with no problem. So what do you think ? Am I still ok.

Originally Posted by mrfixxall (Post 3788070)

is it black and silver with cooling fins or is it all silver..also what do the plugs look like?..

Originally Posted by 01scarab29 (Post 3788407)

Mrfixall ,, its all black , fins on top , with multi pin plug on both sides ,,, i cant add picture because company comp. i could send to cell phone.

Originally Posted by mrfixxall (Post 3788745)

yes its a mefi..you must have pre 2001 engines..