bmousser
Member
Hi,
I wanted to ask any expert available about comparing the BF50a & BF40A differences in the cylinder head. I spoke to several mechanics here and basically got that the only difference they know of between both of these motors were the jet size. Is this true? When exploring on Boats.net (which I like their exploded view of the parts!) I couldn't help but notice that some of the Honda part numbers are identical (by Honda part #) between the 40 & 50. Using my common sense thinking this would be practical in terms of manufacturing and cost. However, I notice that the intake valve part # were different between the 40 and 50. This would mean that the intake valve between the 40 and 50 are different (why would they give an identical part 2 different part #?).
So I'm thinking that the cylinder head between these 2 motors are not inter-changeable given the fact the intake valve part #'s differ from each other and probably have different specs (diameter I'm thinking). It makes sense to when you think in terms of horsepower. Would anyone care to elaborate. Hondadude, pleas educate me................
I wanted to ask any expert available about comparing the BF50a & BF40A differences in the cylinder head. I spoke to several mechanics here and basically got that the only difference they know of between both of these motors were the jet size. Is this true? When exploring on Boats.net (which I like their exploded view of the parts!) I couldn't help but notice that some of the Honda part numbers are identical (by Honda part #) between the 40 & 50. Using my common sense thinking this would be practical in terms of manufacturing and cost. However, I notice that the intake valve part # were different between the 40 and 50. This would mean that the intake valve between the 40 and 50 are different (why would they give an identical part 2 different part #?).
So I'm thinking that the cylinder head between these 2 motors are not inter-changeable given the fact the intake valve part #'s differ from each other and probably have different specs (diameter I'm thinking). It makes sense to when you think in terms of horsepower. Would anyone care to elaborate. Hondadude, pleas educate me................