Prop pitch calculating

[Fishn Technishn]

Got a buddy who has a Stainless steel prop that will fit my motor. Apparently there are NO markings on it that tell what the pitch is!! Only thing visible is 698099-1

Anyone know the best way to measure the pitch accurately?

 

I know there must be some simple method but I can't think of it

HELP!

 

FT

Edited September 22, 2009 by Fishn Technishn

[Roy]

Props are measured using two numbers for example 13 3/4 x 21. The first number is the prop's outside diameter... 13.75". The second number is the pitch. All pitch is is the distance travelled forward in one complete revolution. While this way of measurement is not accurate to the closest ml.... it`s very easy to place the prop on a flat surface and turn it the same way it would turn on your motor in the water. The distance it will have travelled in inches will be the pitch.

 

There are tons of sites that will help you with that.

[Roy]

I also think that that number you have refers to the prop washer. (OMC)

[Fishn Technishn]

Thanks Roy,

I knew it would be something really simple but I was just over complicatin' myself!!

I will call the buddy and ask him just where he read that number!!!

 

Thanks,

 

FT

[Fisherman]

Something like what Roy said, set the prop on the leading edge of the hub, measure from the leading edge of the prop blade, (not the hub) to the trailing edge of the same blade vertically, don't follow the edge of the blade at an angle. Take that measurement and multiply x 3,( for a three blade), it should be pretty close to the correct answer.

[POLLIWOGG]

Prop repair guys might have a jig, or just put it on and try it.