Socket size for prop nut

[trailertrawlerkismet]

We have the Yamaha 250 on our R25OB. I’m wanting to take the prop off but the largest socket I have is 1” and the nut is larger than that. Could also be metric. Does anyone know that proper size socket I’d need for my project? Probably a good idea to have onboard anyway, in the event the prop is damaged.

Jim F

 

[Submariner]

We have the Yamaha 250 on our R25OB. I’m wanting to take the prop off but the largest socket I have is 1” and the nut is larger than that. Could also be metric. Does anyone know that proper size socket I’d need for my project? Probably a good idea to have onboard anyway, in the event the prop is damaged.

Jim F

27mm. I also recommend pairing this with a 16" breaker bar, 1/2" drive.

Best to have a block of wood also to block the prop from spinning as you tighten or loosen the nut.
I use a 2x4 cut to about 8 inches.

Need spare cotter pins too. Don't reuse them.
YAMAHA - PIN,COTTER - 91490-40030-00
https://www.partsvu.com/91490-40030-00-pin-cotter.html?qty=1

Would also want Yamlube marine grease to coat the spline when replacing the prop.
https://www.partsvu.com/yamaha-yama...icant-10-oz-acc-greas-10-ct-2-pack.html?qty=1

Lastly, this tool is worth its weight in gold. Cotter pin removal tool.
https://www.amazon.com/Stanley-Prot...897&sprefix=cotter+pin+removal,aps,201&sr=8-5

We also have a video that illustrates taking off and putting on the prop. Start at the 7:00 minute mark.
https://youtu.be/NBR16FHrYCQ?t=419

 

[Hamster]

1 and 1/16th” socket (1/2” drive) fits. Same size as water heater rod in an RV.

 

[trailertrawlerkismet]

Thank you gentlemen. Good additional advice on the cotter pin Martin. I’ve got the breaker bar and torque wrench already so I’m almost good to go.

Jim F