Prop Change Questions............please

[libellav15]

Info 1972 mercruiser 120 GM in line 4 and pre-alpha leg.

Hi Guys

some advice please - i am going to put a new prop on my pre alpha leg.

i have got the method stright in my head.

but a couple of tips and tricks would be appreciated please.

1) how do you guys stop the prop turning to undo and re-torque the prop nut?

2) is 55lbs torque correct?

3) what grease do you use on the splines?

and this is is confusing me - the tabbed washer currently has the tabs bent down - away from the nut - into the grooves away from the prop nut - how does this stop the prop nut undoing - or is that not the point?

cheers guys

adam

 

[Adirondack]

Re: Prop Change Questions............please

Info 1972 mercruiser 120 GM in line 4 and pre-alpha leg.

Hi Guys

some advice please - i am going to put a new prop on my pre alpha leg.

i have got the method stright in my head.

but a couple of tips and tricks would be appreciated please.

1) how do you guys stop the prop turning to undo and re-torque the prop nut?

2) is 55lbs torque correct?

3) what grease do you use on the splines?

and this is is confusing me - the tabbed washer currently has the tabs bent down - away from the nut - into the grooves away from the prop nut - how does this stop the prop nut undoing - or is that not the point?

cheers guys

adam

1) I usually just wedge a piece of 2X4 between the prop and the cavitation plate behind the trim tab.

2) You should be able to get the torque from your drive shop manual

3) I use trailer wheel bearing grease.

That "tabbed washer" is actually cupped in so the bottom portion of the nut fits inside the lock ring. You will see what I mean when you disassemble it. Just be sure to straighten the tabs before trying to remove the nut.

 

[jimbo3123]

Re: Prop Change Questions............please

and this is is confusing me - the tabbed washer currently has the tabs bent down - away from the nut - into the grooves away from the prop nut - how does this stop the prop nut undoing - or is that not the point?

The tabbed washer has an indentation shaped like the nut that prevents the nut from turning when the tabs are bent down.

 

[libellav15]

Re: Prop Change Questions............please

cheers guys - great tips.

i found a youtube clip that showed the indentation in the tabbed washer that the nut sits in - so i know exactly what you mean - really glad to have got that sorted - it was spinning my head

thanks again chaps

adam