4 blade prop?

[FTB530]

I have a Johnson 2 stroke 15 hp outboard and i am thinking about changing the prop.(this one is a little banged up) i saw one with four blades, is there an advantage with the 4 blade or should i just stick to the oem 3 blade type that is on it now ?thanks for any feedback.

 

[metriccrescentwrench]

Re: 4 blade prop?

IMO a 4 blade prop on a 15 HP would slow you down due to the added drag of the extra blade. 4 blade props are useful with bigger engines where they provide extra prop blade surface area, probably not gonna' do you any good (except for making your wallet lighter).

 

[FTB530]

Re: 4 blade prop?

Thank you , i think i will stick with the three bladed prop!

 

[fishrdan]

Re: 4 blade prop?

What are you using the 15HP outboard for?

Not that I'm any expert on small OB props, but most of the 4 blade props I've seen for small OB's are low pitch props, power props used for kicker motors or pushing heavy loads.

Do you have a link to the 4 blade prop you're looking at.

 

[FTB530]

Re: 4 blade prop?

No link, i was just looking on Amazon and e bay at them,not using it for a kicker , just for all around use,going to get a three blade prop.

 

[Starcraft5834]

Re: 4 blade prop?

4 blades for heavy hulled boats. Or water sports. .stay w 3 blade

 

[pecheux]

Re: 4 blade prop?

I read on IBoat that it is recommended to reduce pitch 1 inch when going from 3 blades to 4.

 

[dazk14]

Re: 4 blade prop?

You don't give ant specs on top speed, etc.. or what you are trying to improve.
A Solas from iboats will give great value.
The stainless Saturn gives max performance. drop pitch an inch - it's cupped.