Cotter pin for Prop...Any one will do??

crazy charlie

Vice Admiral
Joined
May 22, 2003
Messages
5,622
Gonna need a new cotter pin for my Yamaha outboard. I have a Tractor supply store right down the block. A matching size cotter pin should work..?? Btw,I dropped my pin somewhere and figured I would find it with a magnet...NOPE ,it's not magnetic .Usually means it is stainless..?? Charlie
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,810
If your in salt, you want a 316 Stainless cotter pin.
Typical "big box" 303-304 Stainless cotter pin w/not cut it
 

tphoyt

Lieutenant Commander
Joined
Jun 10, 2010
Messages
1,855
Grabs few while you’re at it so you have them next time. I keep extras along with extra nuts and thrust washers attached to my spare prop. You just never know when will wish you had them with you. And keep them on the boat. They don’t help if their in the garage. Trust me on that.
 

Jeff J

Petty Officer 1st Class
Joined
Jun 23, 2021
Messages
373
I would recommend stainless no matter where you are. I accidentally installed a plated cotter pin a couple of years ago while replacing a damaged prop. A month or so later the boat came in for oil change and the cotter pin had corroded bad. The split ends broke off instead of straightening for removal. The loop end broke off and the remains in the prop shaft had to be knocked out with a drift punch because nothing broke straight and the pieces had swelled with corrosion. Except for servicing, these boats stay on a fresh water lake year round. Supposed to be on lifts when not in use.
 
Top