Re: 1979 Evinrude - Main difference between 85hp and 115hp crossflow engines?
i would say both ,on the other hand the vacume the piston creates that doesnt change , so how else you gonna get more feul in , others will add thier share , i think the reason for the bubble back is to cope with more exhaust presure as they have increased the exhaust port.
i would say both ,on the other hand the vacume the piston creates that doesnt change , so how else you gonna get more feul in , others will add thier share , i think the reason for the bubble back is to cope with more exhaust presure as they have increased the exhaust port.