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I have a 1990 90HP that runs great, but is too short for my boat. I also have a 1997 115HP with a blown powerhead, but is the perfect length.
My question is can I swap the powerhead from the 115 for the powerhead on the 90?
If not, will a jackplate work?
I examined the parts diagrams for both. The exhaust housings, exhaust housing gaskets, and exhaust housing adapter plates are the same for both. The only difference is the adapter plate housing gaskets. I don't see a difference visually, but the part numbers are different. So my take is that if I leave the adapter on the 90 when I swap it to the 115 leg, everything should match up.
One issue tho, is that each engine has a different crankshaft and driveshaft. My worry is that the 115 driveshaft might not fit the 90 powerhead.
My question is can I swap the powerhead from the 115 for the powerhead on the 90?
If not, will a jackplate work?
I examined the parts diagrams for both. The exhaust housings, exhaust housing gaskets, and exhaust housing adapter plates are the same for both. The only difference is the adapter plate housing gaskets. I don't see a difference visually, but the part numbers are different. So my take is that if I leave the adapter on the 90 when I swap it to the 115 leg, everything should match up.
One issue tho, is that each engine has a different crankshaft and driveshaft. My worry is that the 115 driveshaft might not fit the 90 powerhead.