Mercruiser 6.2 cracked engine block from cold

[Alex Perebyinis]

Good day to all. Can you please tell me if it is possible to replace the Mercruser block with a block from the car? I read that a block from a Chevrolet might fit. But I did not find specific information or missed it. After the winter and improper preservation of the engine, at the first start, in the spring, after 30 minutes, the engine stalled. At autopsy, an emulsion was found. When dismantled, it became clear that the block had cracked. I don’t have much time and money for a new unit from Mercruzer. Please advise, who can do what? Thanks everyone.

 

[dubs283]

Depends on the generation of the long block. Most mercruiser 6.2 liter engines (older generation/LS) weren't used in automotive applications asfaik.

You may be able to swap in a 5.7 LS long block but would have to remap the ecm

Looks like michigan motorz sells some pricey 6.2 long blocks. Might be the best option

 

[Scott06]

Judging by the picture it is not the older GM / chevy 6.2 but rather the newer Merc made 6.2.
if that is accurate then you can only get parts through merc or a marine salvage yard used engine

i would call michigan motorz go over exactly what have they likely can get you set up with new and reman options

 

[Scott Danforth]

Can you please tell me if it is possible to replace the Mercruser block with a block from the car?

The engine in the pic is not a GM based motor, so a GM short block will not work.

The only choice is another Mercruiser 6.2

If your motor was a 2013 or older, you could get a GM 6.2. (5.7 block, 3.75" stroked rotating assembly - crank, rods, pistons)

Have you called your insurance company? Some insurance policies cover improper winterizing

 

[Alex Perebyinis]

The engine in the pic is not a GM based motor, so a GM short block will not work.

The only choice is another Mercruiser 6.2

If your motor was a 2013 or older, you could get a GM 6.2. (5.7 block, 3.75" stroked rotating assembly - crank, rods, pistons)

Have you called your insurance company? Some insurance policies cover improper winterizing

Thank you very much. Unfortunately the engine was not insured.

 

[Scott Danforth]

Thank you very much. Unfortunately the engine was not insured.

Then I would call around for tornado damaged boats go buy a used motor cheap

 

[tpenfield]

Yes, if it is the new version of the 6.2, which came out about in the year 2015, the engine is all Mercruiser and not a GM-based engine. Got a serial number to verify the engine?

Depending on where you are located, a new engine will be a bit pricey.
https://www.proboats.com/mercruiser-2022-engine-prices/

https://www.sealinkmarine.com.au/shop/mercruiser-6-2l-350-bravo/

 

[Alex Perebyinis]

Yes, if it is the new version of the 6.2, which came out about in the year 2015, the engine is all Mercruiser and not a GM-based engine. Got a serial number to verify the engine?

Depending on where you are located, a new engine will be a bit pricey.
https://www.proboats.com/mercruiser-2022-engine-prices/

https://www.sealinkmarine.com.au/shop/mercruiser-6-2l-350-bravo/

 

[tpenfield]

• 6.2L (377 Cu In) V8 Mercury
• 6.2 MPI 300 HP
• [2A530776 & Up] - Cat.# 90-8M0124044

The cylinder block is listed as not stocked separately. There is a long block P/N . . . 8M0114814. Lists for about $11,000 USD

 

[Alex Perebyinis]

• 6.2L (377 Cu In) V8 Mercury
• 6.2 MPI 300 HP
• [2A530776 & Up] - Cat.# 90-8M0124044

The cylinder block is listed as not stocked separately. There is a long block P/N . . . 8M0114814. Lists for about $11,000 USD

Where is it?

 

[tpenfield]

Where is it?

Not sure what you are asking. This information (part & price) came from online. Where are you located?

 

[tank1949]

Good day to all. Can you please tell me if it is possible to replace the Mercruser block with a block from the car? I read that a block from a Chevrolet might fit. But I did not find specific information or missed it. After the winter and improper preservation of the engine, at the first start, in the spring, after 30 minutes, the engine stalled. At autopsy, an emulsion was found. When dismantled, it became clear that the block had cracked. I don’t have much time and money for a new unit from Mercruzer. Please advise, who can do what? Thanks everyone.View attachment 380516

Laborious but a swap can be accomplished. However, if you find a good auto block, it must be converted to perform in a marine environment. I suggest finding a good core and pay to have a local shop rebuild it to a marine engine. Just my 2 cents....

 

[Scott06]

Laborious but a swap can be accomplished. However, if you find a good auto block, it must be converted to perform in a marine environment. I suggest finding a good core and pay to have a local shop rebuild it to a marine engine. Just my 2 cents....

This is the mecury marine cast 6.2 not the older GM made 6.2. these newer marine specific engines were never used in cars or truck

 

[Alex Perebyinis]

Not sure what you are asking. This information (part & price) came from online. Where are you located?

Located in Latvia

 

[Scott Danforth]

Laborious but a swap can be accomplished. However, if you find a good auto block, it must be converted to perform in a marine environment. I suggest finding a good core and pay to have a local shop rebuild it to a marine engine. Just my 2 cents....

There is no automotive version of the Mercruiser only motor

 

[tank1949]

This is the mecury marine cast 6.2 not the older GM made 6.2. these newer marine specific engines were never used in cars or truck

I have 2 Chevy 383 stroker marine converts from 350s in my Sea Ray. Or, pay 10K to have MC name on the block. Unless transom bolt patterns are NOT the same, I don't see why they will not work. Mine do not have Vortec heads. A good machine shop can just about convert anything or change a 350 to a stroker. Of course, you will have to consider heads, intake and valve cover combinations.

 

[Bondo]

Located in Latvia

Ayuh,.... Welcome Aboard,.... My guess is, yer options are goin' to be severely limited,.....

 

[Scott06]

I have 2 Chevy 383 stroker marine converts from 350s in my Sea Ray. Or, pay 10K to have MC name on the block. Unless transom bolt patterns are NOT the same, I don't see why they will not work. Mine do not have Vortec heads. A good machine shop can just about convert anything or change a 350 to a stroker. Of course, you will have to consider heads, intake and valve cover combinations.

In Latvia SBC parts aren't laying around like they are over here... Yes he can swap out entire bobtails if he likes. Unless he gets complete engines piecing all the parts together you will spend as much as a long block

 

[tpenfield]

OK - Let's summarize where things stand. The OP's questions . . .

• Can you please tell me if it is possible to replace the Mercruiser block with a block from the car? No . . . For this engine, being the new Mercruiser in-house built casting and parts it is unique to Mercruiser and not made from an automotive block.

• After the winter and improper preservation of the engine, at the first start, in the spring, after 30 minutes, the engine stalled. At autopsy, an emulsion was found. When dismantled, it became clear that the block had cracked. Yes - It looks like the crack went into the sidewall of the cylinder

• I don’t have much time and money for a new unit from Mercruiser. There are not any inexpensive routes, since an automotive block is not compatible.

• Please advise, who can do what? The best option - IMO would be to find a used Mercruiser engine in the 5.7 - 6.2 range and replace the entire engine. You could then try to sell the usable parts from the original engine to recover some of the cost.

 

[tank1949]

Located in Latvia

your options are limited!