Mercruiser MC-1 Prop Nut Torque

[1stgenbird]

Not sure if this is the right forum, but I just installed a new Solex Rubex prop on my '73 MC-1 165hp and I don't know what I should torque the prop nut to. The prop instructions say refer to the Mercruiser manual but my manual says call the dealer.
Any help would be appreciated as I am about 2 weeks into owning my first sterndrive.

 

[Don S]

Re: Mercruiser MC-1 Prop Nut Torque

Copy and paste from the service manual.

Tighten propeller nut until a torque of 55 lb. ft. (75
N?m) is obtained and continue until 3 tabs on tab
washer align with grooves on spline washer.
Bend tabs into spline washer.

 

[1stgenbird]

Re: Mercruiser MC-1 Prop Nut Torque

Excellent! Thanks Don. I must have the wrong manual.

 

[Don S]

Re: Mercruiser MC-1 Prop Nut Torque

I just used a newer manual, same props, same shafts.

 

[ziggy]

Re: Mercruiser MC-1 Prop Nut Torque

from service manual #1, which covers '73.
my '75 uses service manual #2. it says the same thing.
i torque mine to 40, then add torque (+5, sometimes it's a little more)till the tab washer lines up.

 

[ziggy]

Re: Mercruiser MC-1 Prop Nut Torque

I just used a newer manual, same props, same shafts.

wow, ya must have your chrystal ball warmed up good today. reading my mind prior to me posting.
op, what he (Don S) says could be true. he's a marine tech, i'm a shade tree. choose your poison i guess.