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1980 mercury 70 hp prop pitch

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Travis L

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I have a 1980 mercury 70 hp. I

I have a 1980 mercury 70 hp. I am running 4900 rpm full throtle i don't have the specs on the motor and i need a new prop i am not sure what rpm i should be running or what factory pitch is on the prop so i can adjust it any info would be helpful
 
i have been there but it doesn

i have been there but it doesn't tell me where to start or what factory is it gives me everything from a 9 pitch to a 16 pitch i don't know where to look on the prop i have now to see what the pitch is
 
"Travis, the pitch is usually

"Travis, the pitch is usually stamped in the prop between the (fins) - alternately, the part number will be on the hub (near the prop nut) if it's a factory propeller.

If you have the 3 cylinder model, your rpms look good with the current prop.

Your WOT for that motor is 4800-5200, and given it's the middle of summer now (which does cut back your rpms somewhat), your prop sounds perfect..."
 
Thanks for the help I did noti

Thanks for the help I did notice on the prop the stamped # at the end it has 15p is that the pitch
 
"Yes, 15p is the pitch (15

"Yes, 15p is the pitch (15" pitch) - it may or may not have the diameter as well (ie 14D etc.).

But as stated, your rpms sound good on your particular set-up..."
 
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