how to get rid of prop walk?

[HyperBaja]

in my scarab, the prop walk is nuts! 10 deg dudder to the right will spin out and 45 deg to the left will barely turn it! i am pretty sure the prop is a 2x40 what about going to a 1.8x42-44? or is there an easier way to get rid of the prop walk BESIDES going with what the manufacturer reccomeds? (22.5cc, i have a 30cc)

[Ron Olson]

Check your rudder. It should be about 1-1/2" below your prop. Your prop sounds like it is too small. Try an Octura X470 or 472.

[HyperBaja]

there is 2.5" under the hub of rudder than only 1" under the bottom of the blade. the prop is almost 2.75" diameter. by smaller, you mean less d and more pitch?

[Ron Olson]

Your prop size sounds about right. You don't have enough rudder in the water. The Octura X470 measures 2.76" diameter with a 3.864" pitch. Is the boat set up with a surface or sub-surface drive? If it is a suface drive, the prop may be too high, giving you the problems.

[HyperBaja]

honestly i dont know, i think it is surface, but i DID not build the boat.

[Ron Olson]

OK, easy enough to tell, is the prop under the boat or fully submerged while running or does it come out of the transom?

[HyperBaja]

off the back, so surface.

[rcboatjunky]

You might try looking online at Boat Modeler Magazine (rcboatmodeler.com). I think it was the last issue that talked about prop walk problems and how you can cure them. They have all the articles posted from back issues.