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Discussion Starter #1
I have a 60 hp Yamaha and I am unfamiliar with the type of prop nut that is currently on the motor now. The prop nut is round in shape and about 3'4" thick, it has 2 small holes on top that I assume are for a special tool for removal. But the part that really has me stumped is how to remove the cotter pin. The head end of the cotter pin is made out of the same material as the round prop nut and appears to be just has thick. It does have 3 small holes on the top of the cotter pin. I tried tapping the cotter pin out, but did not really try to force it out. Any help would be greatly appreciated.
 

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Not positive without seeing a picture
but you might be dealing with a propeller lock.
A security device to prevent theft.

like this...

http://www.yamaha-motor.com/outboard/accessories/acscitemdetail/5/320/1139/8541/all/1/2702/0/detail.aspx
 

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Discussion Starter #3
That's it, any idea on removal with out the keys?
 

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Make a tool to fit the holes and unscrew the cotter pin plug first.
Then another tool to fit the holes on the threaded collar.
Or....if you have the time and patience
a small diameter center punch and tap the cotter key plug unscrewed first.
Then use channel locks to unscrew the collar.
It's an anti-theft device, only designed to slow you down, not stop you.
 

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Call the previous owner? Maybe they still have the "keys". Call Yamaha since it seems to be an OEM product? That way you can continue to use the lock.
 

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Discussion Starter #6
Call the previous owner?  Maybe they still have the "keys".   Call Yamaha since it seems to be an OEM product?  That way you can continue to use the lock.
Did that, waiting for response

I'm going to try snap ring pliers for the cotter pin key. Channel locks will get the collar off
 
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