7920hpMercury
Petty Officer 2nd Class
- Joined
- Mar 13, 2009
- Messages
- 111
Considering buying a 1993 75hp Mercury but really want a 90hp. From doing a couple of searches, looks like carbs are different for the 75 and the 90. I would guess the porting is different too, similar to the old 7.5 vrs 9.8 Mercury. So the intake and exhaust ports would be larger holes and on a different centerline for a 90 vrs the 75. So, I would guess converting a 75 to a 90 by only installing the 90 carbs is not going to totally work, correct??
And as a practical matter, on a light weight boat, would the 75 be close in mph to the 90 anyway??
Much Thanks and all thoughts would be appreciated!
And as a practical matter, on a light weight boat, would the 75 be close in mph to the 90 anyway??
Much Thanks and all thoughts would be appreciated!