Torque for prop shaft nut.

[coalbucket]

I have searched with no success. I purchased a 1988 88 Spl. a couple days ago and would like to run it in the morning. I would like to switch out the prop for a smaller pitch. The problem is my manual has not come in and I need to know the torque value for the nut on the prop shaft.

Oh by the way this is my first outboard, I have also been a I/O kind of guy.:^ But also bought my first fishing boat as well.

Thanks, Ken

 

[AlanR]

Re: Torque for prop shaft nut.

it dosnt really need to be "Torqued.. Just tight. Then you slide the cotter pin threw and your good to go.

 

[Rancherlee]

Re: Torque for prop shaft nut.

Usually tighten it up as tight as I can with my fingers and use a set of pliers to give it just enough twist to reach the next set of holes to allow the cotterpin to go in.

 

[coalbucket]

Re: Torque for prop shaft nut.

Thanks for the respones.

 

[rdgallo]

Re: Torque for prop shaft nut.

My 1994 150 Johnson calls for 70-80 ft. lbs.

 

[imported_lorin]

Re: Torque for prop shaft nut.

I've always wondered about this. Many outboard manuals list a high torque value for the prop nut. rdgallo, for example, says his 150 Johnson calls for 70-80 ft lbs. That's a lot of torque. But as some other posters have mentioned, just torquing a little more than finger tight seems to work fine, and doesn't result in any problems. This has been my experience also. So what's the need for a high torque value?

 

[xtraham]

Re: Torque for prop shaft nut.

I have read in the prop forum that it depends on the prop manufacture, some will rattle at low speeds if not properly torqued, I have seen recommedations up to 100 ft lbs for some... average is 55/65 ft lbs