1978 Slickcraft sx176 what prop?

[sx176]

Hello,

I am new to boating and just picked up my first boat this fall. Its a 1978 Slickcraft sx176 and had a omc 302 175 hp motor in it that was not winterized properly and was seized up. I replaced the 302 with a 235 hp omc 351. It has a omc stringer outdrive. Im running 5500 rpm at wot and running about 48 mph on a gps. i would like to get my wot rpm to around 4500, the problem is I cant read the casting numbers on my prop to see what pitch it is. What pitch prop would you guys recommend for my boat? Also where can I find props for this old stringer? Any help would be appreciated!

Thanks!!

 

[Bondo]

Re: 1978 Slickcraft sx176 what prop?

the problem is I cant read the casting numbers on my prop to see what pitch it is. What pitch prop would you guys recommend for my boat?

Ayuh,... Clean it better, 'n read the pitch, then buy 1, 4"s bigger....

Donno where yer gonna find 1....

 

[sx176]

Re: 1978 Slickcraft sx176 what prop?

Ayuh,... Clean it better, 'n read the pitch, then buy 1, 4"s bigger....

Donno where yer gonna find 1....

It is a 4" dia. prop and there is no way to read it. The prop is all dinged up where it says the pitch the only thing I can tell is that its a michigan wheel prop.

 

[SparkieBoat]

Re: 1978 Slickcraft sx176 what prop?

find a local prop shop that will let you test a few props with promise to buy when you find the right one. I would start with a 23 pitch.

 

[steelespike]

Re: 1978 Slickcraft sx176 what prop?

A prop shop can measure it for you. 1" pitch change is about about 200 rpm
You need to increase about 5".