1984 Mercury 90hp 6 cyl

[randlemanboater]

Originally Posted by turbinedoctor

That might have been me. I have an 84 center console with a 90hp inline 6 and it would do 25 - 30 mph depending on the load I had in it. I just rebuilt the engine and am still breaking it in. Now at 3500 rpms she will do 19 mph, cant wait to get the break in done so I can open it up again. Yes it planes just fine.

Turbinedoctor

Yep.

[Destroyer]

I had that same Merc inline 6 engine on a Cruisers, Inc. 19 1/2 foot tri-hull. Strong engine that would get it up on plane and top off between 28-32 @ WOT. Sweet, strong motor.

Still... I had a V20 I/O with a merc 90hp 4 cyl that would not plane unless it was glass smooth. I really wouldn't have less than a 140 on a V20.