what's the advantage of 4 blade?

[Max7]

Im just wondering what's the advantage of the 4 blade I't would save more gassoline?would go faster?would motor would run less stressful?

 

[walleyehed]

Re: what's the advantage of 4 blade?

4-bld usually helps some with hole-shot, mid-range economy tends to be slightly better, but unless you have an outboard and can raise engine heigth, you'll lose some top-end, in most cases.

 

[WillyBWright]

Re: what's the advantage of 4 blade?

The engine has to work harder to twist the fourth blade. (Depending on the thickness of the blades and total combined surface area.)

 

[Max7]

Re: what's the advantage of 4 blade?

I have an inboard/outboard Mercruiser bravo II would 4 blade would be good for this motor? about on fuel economy?

 

[walleyehed]

Re: what's the advantage of 4 blade?

It's all in the prop design...some will be better than others...
Something like a stiletto Bay Pro in the correct pitch will actually let it unload at mid-range and the result will be better fuel economy.