Prop pitch

[FISHROT]

I have a 1998 120 hp Force and I am looking to purchase a new Comprop of proper size.The prop that is on it now has 48 77318 445 21(P) or possibly (B)stamped into it.I'll be darned if I can figure out the diamiter and pitch from this other than 21P possibly being the pitch.Also would appreciate any opinions on 4 blade Comprop experience

 

[sony2001]

Re: Prop pitch

Do you want anything bigger than the 21. It doesn't exist. Do you have a tachometer? What size is your boat? Comprop have a web site.

 

[FISHROT]

Re: Prop pitch

It's on a 19'Trophy.My WOT rpm is 4900.Manufacture top rpm is 5200.

 

[Hooty]

Re: Prop pitch

The 21P is probably the pitch. Measure from the tip of one blade to the center of the prop shaft and multiply times 2 and that the diameter. It's written dia" x 21"P.<br /><br />c/6<br /><br />Hooty