Johnson 55 crank threads

[maineiac5586]

1987 johnson 55 hp commercial tiller. So in all my messing around trying to get the spun flywheel (broken keyway) off I managed to booger up the threads on the crank. Can I use a die on these threads? Any other ideas of what to do? I tried muscling a flywheel nut down on these and it just ruins the nut. What size and pitch die should I be looking for? Hopefully someone knows how I can fix this. Trying to get this beast back on the water. Thank you

 

[maineiac5586]

I see universal thread chasers on Amazon that automatically adjust to thread. Anyone use one?

 

[tphoyt]

If it were me I would clean them up with a small triangle file. Work slow and carefully. Patients Pays.

 

[Crosbyman]

file should work for you or if you have a dremel tool ....

patience brings joy

 

[racerone]

How are you going to make sure of proper fit , so that the nut won't loosen off.----Key might shear again !

 

[maineiac5586]

How are you going to make sure of proper fit , so that the nut won't loosen off.----Key might shear again !

I am going to lap the crank and flywheel together with valve grinding compound. Clean the tapers make sure they are dry. Torque nut to 105 ft lb

 

[racerone]

How are you going to make sure the threads have the proper fit / contact on the surfaces.---- That is how a nut stays tight.----Perhap loctite will be needed.

 

[maineiac5586]

How are you going to make sure the threads have the proper fit / contact on the surfaces.---- That is how a nut stays tight.----Perhap loctite will be needed.

Ok yes good idea

 

[maineiac5586]

Ok I got it fixed. Used a small triangle file to fix threads followed by a die in the correct size. Didn't take much work at all to fix I have a habit of blowing things out of proportion. Thanks for all the tips I appreciate it as always

 

[tphoyt]

Glad it worked out for ya