Newbe prop question

Jacobm

Recruit
Joined
Jun 23, 2010
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1
I damaged the 3 blade prop on my 1977 75HP Johnson Stinger. The prop was stamped 13.25 x 17.

Yesterday I purchased a Comprop that is a 4 blade 12.8 x 17.

How will this affect the performance of my 17' Lowe aluminum bass boat and is there any potential for motor damage due to the swap?

Thanks in advance for helping the new guy. I've picked up a lot here over the last few months. MJ

P.S. How tight should the castle nut be?
 
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