I'm building a rescue center console boat with an I/O. I'm thinking about putting a single small block in it , boat will weigh around 3900 lbs with motor. What speed should I see. A 500 efi get's ya real close to the 80 mark - BH

brian,are you using your hull with a new CC deck!

Brian,

With the 6.2 Mercruiser you should see about 68.
With the 6.2 Scorpion you should see about 72.

I used a weight of 2750. 150 lbs less due to the small block vs the big block.


Matt

check out this small block 377 with 385 hp

http://www.powertorque.net/engines.htm

Many thanks for the info gang. Yes that is the plan Al - should be awesome - BH

interested in some photos!!! you need to build some darn boats anyway!!