Whats the stock pitch for a '74 Merc 50HP?

[merc_500]

I have a '74 Merc 50HP on a 15' Fibreglass v-hull used for skiing and top end. <br /><br />what pitch should i use? or what did these motors come stock with? Thanks again guys.

 

[WillyBWright]

Re: Whats the stock pitch for a '74 Merc 50HP?

I'm not sure there was such a thing. I think the "stock" props ended with the 20s. Too many variables to have a stock prop on most any motor, but the Market makes some such decisions instead of Logic. Educated guess says use an 11 for skiing, a 13 for speed. A 12 would be good for average use. That could shift an inch either way depending on the health of the motor and the design of the boat.

 

[gasguzzler]

Re: Whats the stock pitch for a '74 Merc 50HP?

will a 50 hp pull a skier

 

[jimmbo]

Re: Whats the stock pitch for a '74 Merc 50HP?

In most cases yes. It won't be at tournament speeds though.

 

[merc_500]

Re: Whats the stock pitch for a '74 Merc 50HP?

would a 15 pitch be to much? i can get one really cheap......<br /><br />yes a 50 will tow a skier, i had an old Chrysler 50 and it could tow a skier, heck i've even skied behind a 12ft tin boat with a 9.9HP merc. lol.

 

[merc_500]

Re: Whats the stock pitch for a '74 Merc 50HP?

is a 15pitch too much? i can pick one up really cheap?

 

[Greg New Zealand]

Re: Whats the stock pitch for a '74 Merc 50HP?

On a 15' hull I would say that you wont get enough WOT rpm with a 15. I have the same motor with a 14 P on a 13' 2" glass hull (no Tach) and I get 35 mph at WOT. My guess is a 12 or 13 P.

 

[Greg New Zealand]

Re: Whats the stock pitch for a '74 Merc 50HP?

BTW - when I purchased my boat it was set up for skiing. Great motors those 500's!

 

[brad1756]

Re: Whats the stock pitch for a '74 Merc 50HP?

I've got a 500 with a 12p. I used to turn about 5k, but am down to 4200 or so(carb problem, I think)It will still plane out a 200lb dude on a tube. I have to run a half circle within the radius of the rope length and then straighten her out though It's mounted on a 1756 GenIII duckboat