Prop Nut Torque
 

Anyone know what the torque spec would be on the prop nut for a bravo XR ( if there is one)

55 lbs.

Ayuh,..... I use my calibrated elbow, 'n torque prop nuts to "Darn Good, 'n Tight",....

Same here.

55 ft/lbs. is snug and then a little extra (about a eighth of a turn).

Brett

So about 60 ft lbs? 65?


55 never seemed tight enough.

I meant to say is that to get 55 ft/lbs., I make it snug and then tighten it about a 1/8 turn.
I know it is over 55 but not by much. 65 or 75 ft/lbs. isn't going to hurt anything. When 55 was determined by Merc, we didn't want people to overtighten and strip threads. There is also the lock washer to prevent loosening.

Brett

I torque to 55 and then give it just a little bit more of a turn. The OP asked for the torque spec.. that's what I gave him...

I tighten it till it's tight. :D

German method:

Guudenteight

What BBLADES said. ^^^^^. 55lbs nope!!!. The nut will loosen. 2x4 in between cav plate and prop 65- 75ft lbs , i like 75 with a little grease. Check it after an outing then again after few more. Especially on new props and hubs. Its a 3/4 nut you wont hurt it.
yeah old thread i know. I have had bolts loosen a couple times on different boats, now they get tightened. Last year one guy lost a prop another guy, bolt came loose. Both of them torqued to 55. Didnt want hear my story.

It's not what I say it is what Mercury says. I typically over tighten too. (without even realizing it.)
But, with a new fiberlock nut, 55 lbs. is fine.

Brett

I set the torque wrench at 65 and use a touch of blue locktite as well. Let it set overnight and good to go. Never lost one yet. Have seen a set take the deep dive, not mine, at the Merc clean 55 and good to go. That marina employee adjusted his procedure on the bosses boat to 75 and red!