Head Gaskets

[tabme]

I am swapping out a set of 34cc heads on my 1998 200 efi. What thickness gasket would the S&F Gurus recommend. 1.0/1.2 or thicker. I will be running 93 Octane and timing recommendations. Thank you

[Jay Smith]

With all 34 CC head mods at sea level I have great luck with the Pro Marine 1 MM head gaskets , sorry to say there now out of stock as of last monday , try WSM but I bought the last 6 pair , might be in stock now ... Pro Marine part number is 44R1 for higher compression ..

Jay

[90 5.0]

I am swapping out a set of 34cc heads on my 1998 200 efi. What thickness gasket would the S&F Gurus recommend. 1.0/1.2 or thicker. I will be running 93 Octane and timing recommendations. Thank you

34cc heads, with 1.0 gaskets on my promax on my fishing boat pumps up to 148-146psi on all 6 on my gauge.

I’ve been running it that way on 93 for hundreds of hours. (It’s time for a rebuild now, due to hours no negative signs from head cc and gasket size choices).

Hope this helps.

[Merc 2.5]

I used 1.2 gaskets I'm at 145 , plus just little safer incase bad gas or sumthin but the 1.0 will wrk fine to