Our Techumseh 8HP has a Champion J8C
318cc. is 8hp. 305cc.is probably between a 6 to an 8hp.
What year is the 8hp Mercury outboard with serial o6156590 ?
On a valve-in-block 8HP with an RJ19LM or equivalent plug, it is 0.030"
yes
I have an early 90's 2cyl, 8hp, 2-stroke and the gap is .040.
some sites say 1952 ,others say 54, and that model# is a 7.5 not an 8hp
8hp-14hp
1992
1967 110 8hp
8hp
mercury mix 50:1