Supa Dolfin Props

I have a supa dolfin with 2 old ish 40 yamaha`s on the props that are fitted at the moment don`t seem to get me onto the plain with only one motor is this standard as I was thinking it would be nice if the boat could get onto the plain with one motor.

So the question is which props should I fit and where would be a good place to source them from ?

I don`t do any beach launching and only fish around mossel bay and knysna area.

Thanks

Prop markings 11G and the other is a 12 G

What should the props cost more or less ?

Looks like everyone is as lost as I am :?

Hi Rob,

There are many factors that would not put your boat on the plain with one motor. Try these suggestions first before spending money on props.

Lift the default motor so you do not have unnecessary drag.
Put the crew in middle of the boat, or try getting on plain with just you on the boat to test.

Remember dropping in prop pitch to get more bottom end torque, will reduce your overall speed. This is not practical in your situation as you do not do surf launching and if one motor fails then you can still get back to base slowly.

You could also have hydrofoils attached to your motor which will cause the back of the boat to rise alot faster and put you on a plain.

I have a super dolphin aswell with 2 x 40hp yamaha motors and mine gets onto a plain very quickly.

I will check tonight when i get homem what pitch the props are and let you know tomorrow

looks like you have two different pitch props, a 12 inc and a 11 inch.
Measure the distance between the trimtab and the blade and it should be the same on both motors. 12 is standard.

looks like you have two different pitch props, a 12 inc and a 11 inch.
Measure the distance between the trimtab and the blade and it should be the same on both motors. 12 is standard.

Ek het 13's op my twee 40hp en dit werk uitstekkend

Ek het begin met 12 duim props en nou hardloop ek 14 duim.
The props have two number on them.
Something like 11 1/2 x 12
The first one is the diameter in inches and the second one is the pitch, which means that for every complete revolution, the prop will move 12 inches forward.
The gearbox ratio of the motor needs to be factored in and then you can work out top speed.