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January 18, 2019 at 2:35 am
#163925
{contentNot on that early of model. Started with 1992 60* 150/175 if memory serves me correct? Called staggered combustion chambers. Bottom two cylinders will show 5 to 7 lbs less compression. You can tell if you have one of these cylinder heads by how deep the spark plug recess is. The two bottom spark plug holes will be shallower for the threaded area. That is because the combustion chamber is deeper. It’s the easiest way to tell without pulling head. Part number is dykem on head, but sometimes has been washed/wore off.
Dan in TN
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