what are my options?

[newbie_owner]

I have a 69 mercury 50HP on the back of my 71 MFG Gypsy 14'. I just wanted to know what kind of prop I should get that would help me to plain faster.

 

[K.P.]

Re: what are my options?

What diameter and pitch prop do you have now and what kind of RPM's are you getting at wide open throttle (WOT)?

 

[newbie_owner]

Re: what are my options?

I will have to check that out and get back to you.

Thanks

 

[newbie_owner]

Re: what are my options?

So the numbers on the prop are:

15p A1
31085
16701

I am guessing 15p is the pitch, but the rest I have no idea.

as for the WOT RPM's, my Tach does not go any lower than 2000 RPM even when the engine is off. When I am WOT it reads 5500, but I am not sure if that is 3500 or 5500.

Thanks

 

[newbie_owner]

Re: what are my options?

The diameter, to I just measure it with a measuring tape?

 

[newbie_owner]

Re: what are my options?

I measured it with a tape, and it is 10 inches from tip to tip.

So its 10 inches diameter and 15p and running 5500RPM at WOT. What Can I change it to in order to plain faster?

Thanks

 

[steelespike]

Re: what are my options?

I measured it with a tape, and it is 10 inches from tip to tip.

So its 10 inches diameter and 15p and running 5500RPM at WOT. What Can I change it to in order to plain faster?

Thanks

With a 3 blade you need to measure from center to tip and multiply by 2.
Generally the diameter will follow the application may vary some brand to brand pitch to pitch.If 2 or 4 blade youve got it tip to tip.
You need to confirm the rpm/tach perhaps borrow a shop tach.
If your really at 5,500 you are at the rated max rpm.If you can get a gps speed it will help determine where your really at.Get us the max rpm and speed we'll go from there.The health of your motor depends on the proper setup.

 

[rainbro]

Re: what are my options?

I have a 13p 10 1/4 "on my heavy gauge 14' aluminum v-hull it jumps out of the water with an 83 merc 50hp.You may have to limit wot as not to overrev.

 

[newbie_owner]

Re: what are my options?

Ok,

I finally have all the info:

Fully loaded 5500 RPM @ 28 MPH.

 

[junior1113]

Re: what are my options?

smart tabs would help hole shot. or a 13pitch 4 blade

 

[newbie_owner]

Re: what are my options?

Thanks, I will check that out