18 with a 90?

[DANNY18SC]

how do you think me 18 will perform with a 1990 90 hp Johnson with a 17 pitch prop? it is a 20" motor and my transom is 25". should i look for a 25" midsection or cut the transom?

[Fr. Frank]

You need more than just the midsection; you need the right driveshaft to go with it. Don't cut down the transom. Let me repeat that: Don't cut down the transom.

[DANNY18SC]

since your boat has a 90, seems my 18 CC would do fine with a 90 and one day i could look for a bigger motor. anyone know of someone with all the 25" pieces for a 1990 90 johnson?

[uncleboo]

I agree with Fr. Frank, don't cut the transom down. I wish mine was a 25". I don't have any problems with the 140 4s on my 20" transom, HOWEVER, you won't see me going out in snotty conditions. I spend most of my time in the Albemarle Sound and only go in the ocean on nice days.

[Bigshrimpin]

http://www.baymfg.com/

This is what you need to make that 20" motor a 25"

[eggsuckindog]

You really need a 25" 115 at best, I bet you can do with a sale/swap in those years pretty easy. Sell yours and buy a 115, should be pretty even and easier

[Bushwacker]

Sell yours and buy a 115, should be pretty even and easier

I agree - if you add the $ you'd spend on the 25" extension kit to what you'd get for current motor, you might be able find a newer 25" 115. The 90 (used to be an 85) and the 115 are both V-4's, so same block and about the same weight. However motor condition/compression is more important than age. Would be best to get a loop charged model (60 degree V) instead of the older cross-flow 90 degree V, but I don't know when they started making the loopers.