Originally Posted by Seahunter09
It has always been my impression that a 90hp was just a 75hp with a different carb. Correct me if i am wrong. I had a Delta 5-5 with a 75hp mariner in the mid 90`s for 5years and that went brilliant. Thanks
Yes, you are right, the 75, 90 & 115 are all the same engines but no longer have carbs, the main differance is a different pcm. you will find that a 75 optimax will be 75hp but with older 2 strokes, a 75 would probably actualy be more than 75hp, this is the case with merc/mariner 2 strokes, not sure on other brands.
As others say if you were happy with your 70, you should be ok with a 75 opti