Prop with no numbers, how do I tell Pitch??

[SparkieBoat]

I have a SS prop off of an 89' Johnson 100HP 20" shaft. I cannot find any legible numbers on it. Any other way to tell the pitch??
Thanks Sparkie

 

[Bondo]

Re: Prop with no numbers, how do I tell Pitch??

Ayuh,... Did you look Under the retaining nut,..??

 

[SparkieBoat]

Re: Prop with no numbers, how do I tell Pitch??

yeppers...I have the prop sitting here on my desk..I think I can see where some numbers use to be..but nothing legible. I can make out the M trade mark that you see on all OMC parts. Is there a way to measure the prop somehow to determine pitch??

 

[SparkieBoat]

Re: Prop with no numbers, how do I tell Pitch??

is there a way to check the angle of the prop to determine the pitch??

 

[Silvertip]

Re: Prop with no numbers, how do I tell Pitch??

Not accurately. A prop shop will use a pitch block to determine pitch.

 

[SparkieBoat]

Re: Prop with no numbers, how do I tell Pitch??

thanks