prop nut torque

[bbushay]

I have a Mercury Mariner 9.9 outboard from the mid 90's The Prop nut is a brass nylock nut. What is the torque specification for this nut?

 

[steelespike]

Be sure the Nylock is fresh and take up the slack.
Not exactly by the book but has worked for 60 years.

 

[Fed]

Late 90s 9.9HP manual says 70 Lbs.Inches so not real tight, maybe about 6 Lbs on the end of a decent spanner.

 

[bbushay]

Be sure the Nylock is fresh and take up the slack.
Not exactly by the book but has worked for 60 years.

Are there any problems using a steel or even stainless steel Nylock instead of Brass if I only operate in fresh water?

 

[bbushay]

Late 90s 9.9HP manual says 70 Lbs.Inches so not real tight, maybe about 6 Lbs on the end of a decent spanner.

I guess that explains how I could take the old one off just using the socket and my fingers

 

[steelespike]

Are there any problems using a steel or even stainless steel Nylock instead of Brass if I only operate in fresh water?

As long as the Nylock is working as it should no problem.
Probably best with a higher grade a stainless (more nickel )Easy to check with a magnet.
Weak attraction to the magnet.Some stainless is almost as strong attraction as normal steel.
Probably just a cosmetic issue.