Prop for a 15' Whaler
 

A friend of mine is reriging a 1978 15' Boston Whaler with a 1999 70HP Johnson.
Not looking for top end speed as we have other boats for that.
He will be pulling skiers, tubes, and going fishing.
Looking for pulling power and the most stable ride.
How about a 4 blade aluminum?
What pitch to try?
Thanks,

Re: Prop for a 15' Whaler
 

Hey Pat,

Merc doesn't have a 4 blade for that motor. have to get to the V4's for the hub changes. Mich wheel has 4 blades in aluminum for the small and big gear cases. The large case is what you need, I think. They have 10 and 12 pitch. Probably too small. How about a 3 blade stainless? Good durability and better performance out of the whole than a aluminum.

Re: Prop for a 15' Whaler
 

Hi Brett,

I did find a 4 blade aluminum prop. What do you think?

http://www.solas.com/products/propel...No=S02&PdKd=AL

Yes, Gregg will likely buy a stainless performance prop eventually, but his wife and kids are going to run this boat too.

Thanks,

Re: Prop for a 15' Whaler
 

Yeah, if you want unique stuff, or you can't find it anywhere else, Solas or Mi wheel are go to's.

The problem is the QC on those props isn't always the best. I think a Silverado 3 bl stainless from Merc will perform better on the top and as well down low. I think the prop you are talking about is very reasonably priced so that trying it would be cost prohibitive. If he likes it, great! Otherwise we can try some stainless.

Take care

Re: Prop for a 15' Whaler
 

Pat,

Try a Stiletto Bay Pro I four blade stainless steel propeller. 13-1/4" diameter and pitches from 13" to 19" are available.

Re: Prop for a 15' Whaler
 

MI wheeel

Re: Prop for a 15' Whaler
 

Hey Brett,
I received two used props I bought last week.
The M+ is in great shape so I'll try that as is before sending it to you for tweaking.
The Mach I received is a bit rough so I'm not sure if I should run it as is. Do you have the dies to bring that prop back to its stock shape? It is a ø14.5 x 28p round ear stern driver.

Re: Prop for a 15' Whaler
 

Check you email inbox.

Re: Prop for a 15' Whaler
 

Thanks Brett,
I'll be sending two props your way early next week.

Re: Prop for a 15' Whaler
 

I have a 97 15 BW with a 13 pitch 3 blade (aluminum I believe) that is turned by a Yamaha 60 HP 4S. Boat runs 41 MPH GPS but chine walks really bad above 39-40. Out of the hole is fair.

Re: Prop for a 15' Whaler
 

turbo makes a good 4 blad that will work on that 70 . 2+2 x

OK Guys,
Last night I was out with friends on the 15' Whaler.
1976 15' Super sport powered by a 1999 70HP Johnson.
3 people, full cooler, skis, gear, (2) full 6gal gas cans.
The boat has a 17p aluminum 3 blade prop.
She pulled skiers great and carried the heavy load around well for such a small boat.
Top speed on the GPS was 35.2 at 5700rpm. The manual says WOT should be between 5000 and 6000rpm.
We originally thought the boat would need a 4 blade to pull us heavy guys out of the water but the 3 blade worked fine.
I'm thinking a 3 blade stainless prop would probably give the boat a little better overall performance.
Should he stay with a 17p or go for a 19p?

A good and relatively inexpensive way to find out is to get one of the adjustable pitch plastic 4 blade props for about 100 bux and run it at 17 and 19 and see how the overall performance is then buy the expensive stainless at te correct pitch to match. It worked well on my 15 but I have an old 50 M on mine.

Not a bad idea...

New 3 blade 19p aluminum props go for $90-$120 so maybe we can find a used one for $40-$50.
Sure would be worth it before spending $300 on a stainless that may or may not work.

I have a 21" stainless three blade on a 1989 15 Whaler with a 75hp Merc. Runs great, will pull anything, planes very easily with 4-5 people on board. The boat is so small and light and overpowered you dont need a 4 blade.