prop question concerning a low end studdor

[Markrhoades]

I have an 84 skeeter sf150 boats dry weight is 1050 lbs it currently has a 1980 mariner 115 6 cyl on it with a SS 23 pitch prop with some small cupping would that tall of a pitch cause the motor to studdor with 2 people about 150 pounds each also trolling motor, batteries and fishing gear

 

[steelespike]

Re: prop question concerning a low end studdor

What is the wot rpm and gps speed.23 seems like an awful lot of prop.

 

[Texasmark]

Re: prop question concerning a low end studdor

I ran a Ranger 17' pad boat with a I6 115 last year they were built. I had a 21P Laser prop on it. At max setup it ran right at 50 and 6000 rpms with me alone in the boat, 2 batteries, 10 gallons or less fuel, and live well dry. I used the same prop to water ski with my light weight son in the boat and my 250# on the slalom. Hole shot worked fine as the prop was ported and that did the trick.

Do you know if the engine was "Brake HP" or "Prop HP" rated. Could make 10-15% difference. Back in 1980 I think you were a little early for prop ratings. So that says you are looking at 100 horses give or take. Then like spike said old age kicking in.

Is that a 15' boat with a pad? Is it like their Wrangler?

I know props have their own signatures, but I too agree that 23P is getting on up there with a 2:1 gearbox. That's more like what you'd run on the 150 XR Mercs with the small gearbox.

My 2c,
Mark