Engine Block Question

[Mark & Molly]

Out of curiosity, does Mercruiser make their own blocks for their engines or are they still using GM short block and adapting them for marine use such as for engines like the 6.2L stern drive??

 

[Wanderer 290]

Gm

 

[Lazy Daze]

Your 6.2L is made by Merc.

 

[Mark & Molly]

I know they are assembled by Merc but cast iron block, crank, rods, bearings, valve train those are likely made by GM and shipped to Merc who then attaches all the peripheral items. Internal combustion engines are extremely expensive to make unless you make millions every year which GM and Ford do. My 1976 Sundancer had a 351 Ford - another great block!

 

[scoflaw]

I know they are assembled by Merc but cast iron block, crank, rods, bearings, valve train those are likely made by GM and shipped to Merc who then attaches all the peripheral items. Internal combustion engines are extremely expensive to make unless you make millions every year which GM and Ford do. My 1976 Sundancer had a 351 Ford - another great block!

Not so, Mercruiser has been making all their engines since about 2015. Just a bit confusing to some because Merc use to use GM engines and a 6.2 was one of them. Mercs 6.2 is not the same engine as GM's

 

[Lazy Daze]

Yup. They are truly "Mercruiser" engines, now. Not that the old setup was necessarily 'bad', but these new engines were developed from the ground up to be a marine engine, designed around how a boat engine is used. Time will tell, but so far they've been very good.