Mercruiser 6.2 repower/finding an engine

[miketoppi]

Hey guys I have a 2002 6.2 377 mercruiser I’m looking to find a replacement engine. I’m wondering has anyone been able to repower with mercruiser 6.2 383? They are cheaper since the 6.2 377 is getting harder to find. I think the computer would either have to be flashed or swapped and I’m not sure about anything else that wouldn’t fit any help would be appreciated, thankyou!

 

[Scott06]

Hey guys I have a 2002 6.2 377 mercruiser I’m looking to find a replacement engine. I’m wondering has anyone been able to repower with mercruiser 6.2 383? They are cheaper since the 6.2 377 is getting harder to find. I think the computer would either have to be flashed or swapped and I’m not sure about anything else that wouldn’t fit any help would be appreciated, thankyou!

I believe the 383 is just a remanufactured 377, given a .030” overbore. I cant see needing to reflash the ecu for this. Try michigan motorz i belive they sell reman and new base engines

 

[alldodge]

I believe the 383 is just a remanufactured 377, given a .030” overbore.

Correct
350 with longer stroke = 377
350 with longer stroke and bored .030 over = 383

 

[Scott06]

Correct
350 with longer stroke = 377
350 with longer stroke and bored .030 over = 383

And no ecu mods for 6 cubic inches , right?

 

[alldodge]

And no ecu mods for 6 cubic inches , right?

Correct

 

[stresspoint]

compression ratio may be a little different but i think the ECU will manage just fine.

 

[alldodge]

Boring this motor is do different then boring any other motor (4.3, 350, 454, 502,etc) clear up to .060

Merc programs the ECM fat, so as it's bored there is still plenty of fuel

 

[Scott06]

reman 6.2 https://www.michiganmotorz.com/6-2l-vortec-marine-engine-1996-current

New 6.2 merc longblock

6.2L Marine Engine (2002-2009) MerCruiser (THREE YEAR warranty)

6.2l-Merc-engine-2009-2016

www.michiganmotorz.com

New base engine from different supplier pricing is better

New 6.2L Vortec "Stroker" Marine Base Engine (replaces years 1996-present)

Family owned and operated with over 40 years in the marine engine and parts industry. Our Florida location provides you with affordable marine engines and parts

marineengines4less.com

Reman https://marineengines4less.com/remanufactured-6-2l-383-stroker-vortec-1997-up-marine-base-engine

 

[miketoppi]

Man thanks guy that’s some good information and thankyou for the links aswell!

 

[Scott Danforth]

what is wrong with the original engine?

your local engine machine shop can also help you.

the merc 6.2 is nothing but a 350 block, a GMPP crank and GMPP rods

 

[miketoppi]

At this point I don’t think I want to mess with any old parts, the old motor sucked in water most likely a mixture of old parts and failed gaskets. I’d rather turn the key and not have any problems. So I’m looking to just get a full package all accessories included or atleast new from oil pan to valve cover and then I can piece all the other new parts together.

 

[Scott Danforth]

At this point I don’t think I want to mess with any old parts, the old motor sucked in water most likely a mixture of old parts and failed gaskets. I’d rather turn the key and not have any problems. So I’m looking to just get a full package all accessories included or atleast new from oil pan to valve cover and then I can piece all the other new parts together.

if you are looking for a new long block, you can go with either your local engine builder, you can order new GM motors yourself, or you can get one thru places like michigan motorz, marine power, etc.

to that you buy new exhaust manifolds, etc and migrate the other parts

if you want a new complete motor, then see your Mercruiser dealer. if you have a good relationship, you are looking at $12k for a remanufactured motor with new accessories, or a lot more money for a brand new motor. (the new 6.2 with DTS is about $40k from mercruiser)

if you boat in salt water, suggest a heat exchanged cooled motor.