Pontoon Boat & Deck Boat Forum

Need a bit of help from some of the prop smart folks here. What I have is in my sig. I run two different props depending on my location and load.
A 14 x 13 and a 14 x 11 three blade aluminum. Both props keep me where I should be as far as R.P.M.' go. Between 4500 and 5500 on my engine.
My problem, I am 800 miles away from my boat for the next couple of weeks.
At a flea market here I picked up a new in the box three blade S.S. prop for real cheap. The size is 13 3/4 x 13. My question is what kind of difference can I expect as far as R. P. M. 's go. If it will not work for my boat,I'm sure I can get my money back in a resale, just could not pass up a bargain.
I appreciate any and all help. Thanks in advance.



JD

Your just purchased prop(13 3/4 x 13) will let the engine turn up more than the 14x13 not much, but a little more , you may not even notice the difference on your tack. Maybe only a couple of hundred revs if that.

I'm guessing your 14 x 11 should let your engine run close to the top rpm. I'm guessing there is a big difference in the rpms of your two original props.

RcgTexas wrote:Your just purchased prop(13 3/4 x 13) will let the engine turn up more than the 14x13 not much, but a little more , you may not even notice the difference on your tack. Maybe only a couple of hundred revs if that.

I'm guessing your 14 x 11 should let your engine run close to the top rpm. I'm guessing there is a big difference in the rpms of your two original props.

Thanks. Searching the net does not give hardly any info on rpm change with diameter,just pitch. You are correct in the rpm difference in my props 5000 with the 13 and 5500 with the 11 pitch
The 13 seems to be ok if the wife and I are putting in at the river just for some fun on the water.
When we are going shrimping,crabbing or fishing in the sound I run the 11 cause we are usually loaded with all kind of goodies.
Great to know there will not be much change using the new prop. Paid $50.00 for it. Crazy cheap. Thanks again for your help.





JD

Your RPM's may be about 50 lower and your top speed should be up a couple MPH.
I personally got 4 MPH with a SS prop.

DWRAT wrote:Your RPM's may be about 50 lower and your top speed should be up a couple MPH.
I personally got 4 MPH with a SS prop.

Many thanks. Appreciate it.




JD