How do you tighten up the flywheel ??? What torque?

[de]

Another stupid question. I'm wrapping up the rebuild of a 1969 25hp Evinrude ... and everyone says that I must torque the flywheel back on to some exact force, but I can't find the spec for this anywhere. I have the original 1969 shop manual and it isn't mentioned.

Also, how do you keep the flywheel from spinning while putting the wrench to it. Putting a 2x4 at the prop just doesn't seem right. I don't won't to break anything. I don't have to buy another special tool do I?

Thanks again,

 

[wilde1j]

Re: How do you tighten up the flywheel ??? What torque?

The best way is to use a flywheel turner (avail from NAPA stores) or make a large strap wrench. The torque value should be in your shop manual ... I've never seen an OEM manual that didn't have the torque values for all fasteners requiring torquing.

 

[lindy46]

Re: How do you tighten up the flywheel ??? What torque?

40-45ft.lbs is the proper torque. I leave the back bolt from the recoil starter on (Sticking up) and jam a piece of 1x2 between the bolt and the flywheel sprocket to hold it still. Works on bigger motors than a 25hp so it should work fine.

 

[F_R]

Re: How do you tighten up the flywheel ??? What torque?

Home made strap wrench. Piece of 2x2 lumber and a nylon web strap. Or an old belt that you don't need any more to hold your pants up.
Cost, next to nothing.

 

[James R]

Re: How do you tighten up the flywheel ??? What torque?

Air impact gun works well. No need to hold the flywheel. Maybe a little unscientific but I have never had a problem or damage. I am sure I will get some nay sayers.

 

[samo_ott]

Re: How do you tighten up the flywheel ??? What torque?

if it's electric start I use a big screwdriver in the teeth of the flywheel and lock it somewhere. For not toothed flywheels, I use an old fan (V) belt and wrap it around in the groove for emergency starting and that gets a great grip on it. But you usually need 2 folks to do it thataway. 1 to hold, 1 to tighten.