Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: Prop for Outrage 18, Honda BF150

Posted by tedious on 07/16/12 - 9:55 AM
#1

My sister-in-law purchased an Outrage 18 over the winter. It performs reasonably well with the current prop, which appears to be a generic aluminum - turns right up to the 6K redline. I don't have a speed measurement, but it's starting to chine walk at WOT so I'm guessing high 40s. However, it just feels to me that the prop isn't gripping very well - seems to ventilate a bit on initial accelleration, and in some turns. So I'm advising her to get a decent SS prop, but I need some help on size.

The existing prop looks like a generic black aluminum, and it's in decent shape. I didn't see any markings on it anywhere, and it doesn't seem to have much cup. From using a prop calculator, with RPM = 6K, gear ratio 2.14:1, a guess at 8% slip, and a guess at 47 MPH, I come up with 19-pitch. Can anyone confirm this from a similar boat / motor?

If it's a 19, I'm thinking to go to a 17-pitch in a Stiletto Advantage II, but with the motor's wide range of allowable WOT RPM, might consider going with the 19-pitch and bringing the WOT RPM down a bit. Again, if someone has specific experience with this combination of boat and motor I'd appreciate hearing about it.

I also forgot to check where the motor is mounted so advice on that would also be appreciated. Thanks!

Tim