The new boat has a 10 ft. Caribe RIB with 15 HP Yamaha 4 stroke.

To say it has a planing problem is an understatement. Even with a single
person, it's forever to get on top of the water.

Any listees with experience using a Doel-Fin on a similar application?
I've tried adjusting the motor angle, no improvement.

Just another item on the long list of bugs!

Steve Sipe
Solo 4303 "Maerin"
Upper Chesapeake

I used a Doel Fin on an Avon RIB 280 and it was excellent. I also placed the
gas tank in the bow and bought a cheap extension arm for the motor's tiller
arm. This placed my weight further forward. As a result, I could easily go
too fast. The bolts and the aluminum transmission housing could react so use
Tef Gel or Lanocote to protect these dissimilar metals.

Ron Rogers

Steve:

The Doel-Fin will work as advertised and will improve your ability to get up
on plane. Another improvement that will help as much as the D-F is a flatter
pitch prop. Given that your motor is 4 cycle and it has a peaky power band,
you will see a lot of improvement with the flatter pitched prop.

FWIW, with a 10 hp two cycle and a 10' Apex RIB I could easily plane three
people with the standard prop and no D-F. I only needed help when I switched
to a heavier and shorter RIB.

David

Yep. Had one on a Yamaha 55 outboard strapped to a 17ft RIB. Worked fine and
I would buy one again.

As has been said, weight distribution is all important.
One person and a heavy motor in a little inflatable will struggle to get on
the plane.

Regards

Roger Bingham
France