motor weights, too much?

[Bushwacker]

Sound like you're looking at 4 strokes. Don't know what your objective is but if you want speed, stay with a 2-stroke! Be advised that weights on those motors are really closer to 500 lbs because the quoted weights are DRY weights! When you add 6-7 qts of lube and gear oil that's another 35-40 lbs! I also understand they don't include weight of the cowling, since that's not on the motor when they hang 'em from a scale!

I agree with Egg that the 150 4 strokes you mentioned are way too heavy. You have to remember that Moesly designed the 19 Bowrider and 20' hulls for 300 lb motors! As you get over that, you're progressively screwing up the balance of the boat, and I'd think the smaller 18 is even more critical.

The heaviest 4 stroke I'd consider is the 140 Zuke and I think it's a little heavy for an 18. Suggest you send a PM to Snookerd, as he had one with a V-4 2 stroke and his dad has one with a 140 Zuke. I believe he feels it'd ride better with a lighter motor.