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Old 12 September 2006, 14:49   #11
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Torque setting for the prop nut for my 50hp Mariner is 55ft/lb-I'd asssume it's going to be around the same on most outboards. In other words, do it up bloody tight!
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Old 12 September 2006, 16:00   #12
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Quote:
Originally Posted by Nos4r2
Torque setting for the prop nut for my 50hp Mariner is 55ft/lb-I'd asssume it's going to be around the same on most outboards. In other words, do it up bloody tight!
Not on Johnsons anyway - the figure I quoted for mine was from the "ofishul workshop manual" and if you did the prop nut up very tight the nylon washer under the nut would just split.

I was surprised it was so low, but I suppose the torque from the shaft is taken by the splines, and the thrust force by the metal thrust washer in front of the prop, so maybe it doesn't need to be tight. Other engines may of course be different again, no idea about Hondas.
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Old 20 September 2006, 13:01   #13
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My Yam's prop nut torque spec is more like the Honda's: 40 ft-lbs (55Nm.)

Stephen; you can avoid manually turning your motor over by sticking a piece of 2x4 between the prop and the anti-ventilation plate and using that to block the prop as you crank on the prop nut.

jky
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Old 20 September 2006, 22:32   #14
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A few good thumps on the spanner while in gear shifted mine, it hadn't been off for six years and seemed as if it wasn't greased. The new prop fitting kit went back on with liberal helpings of the Johnson blue waterproof grease so hopefully will be OK next time
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