GM marine 3.0L (Mercruiser)
Posted: Mon Aug 07, 2017 4:31 pm
Hi,
Does anyone know if the 1987 head from my 3.0L (has dished D shaped pistons) will work on a similar year 3.0L rebuilt .060 short block (it also has a 2 piece rear seal and my flywheel will bolt up) I found that has flattop pistons (the owner said it had those) or will the compression ratio be too high? Maybe some companies did that for a performance increase.
Maybe also worth the possible HP increase as premium pump gas could be used with no problem.
I see a site showing 2 part # s for their replacement quicksilver heads, with one for 1963-94 and the other for 1990 and up having a different part #
Does anyone know if the 1987 head from my 3.0L (has dished D shaped pistons) will work on a similar year 3.0L rebuilt .060 short block (it also has a 2 piece rear seal and my flywheel will bolt up) I found that has flattop pistons (the owner said it had those) or will the compression ratio be too high? Maybe some companies did that for a performance increase.
Maybe also worth the possible HP increase as premium pump gas could be used with no problem.
I see a site showing 2 part # s for their replacement quicksilver heads, with one for 1963-94 and the other for 1990 and up having a different part #