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Compass Marine How To | all galleries >> Compass Marine How To Articles >> Lap Fitting A Propeller To A Shaft > Proper Installation of Nuts
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Proper Installation of Nuts
21-MAY-2010

Proper Installation of Nuts

Yes, the small nut is supposed to go on first acting like a lock washer, with the big nut backing it up. I always torque with the big nut then flip flop them and lock them onto each other with two wrenches.


Once the nuts are on and torqued install your cotter pin. I have found that if I don't really bend over the cotter that it can hook weeds. Ideally you don't want to bend them that much, but figure out what works for your local waters.

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Hannes 23-Oct-2012 05:37
Great to see someone fitting a lock-nut correctly! good article.
Chuck 17-Mar-2012 16:06
I have heard the other way.big next to prop and little next to nut.What does ABYC have to say about it?