Head Gasket Rapair on 1972 Johnson 9.5

[michiganman18]

have the gasket, have the motor, my manual is being shipped in from far away. Whats the process? Just place on head and bolt on.... no sealer, nothing?
need some help please. if you can be detailed it'd be very helpful
thanks

 

[rolmops]

Re: Head Gasket Rapair on 1972 Johnson 9.5

Exactly as you said.Just put it on and bolt it on.
But.. While you have the head off,you should check out what the piston looks like and maybe clean it with a soft copper brush and do check out to see if there is any easily removable dirt in the visible cooling water ducts.

 

[michiganman18]

Re: Head Gasket Rapair on 1972 Johnson 9.5

What about the torque process?
or order?

 

[jbjennings]

Re: Head Gasket Rapair on 1972 Johnson 9.5

Run a tap through all bolt holes. It was wisely recommended to me to use new bolts, but up to you of course. No sealant on gasket, but a little gasket sealant on the bolts to keep them from seizing up over time. Start lightly tightening on the center bolts and work your way around in a circle, tightening the bolts farther and farther from the center. Work up to the recommended torque, don't just tighten each bolt to spec. Your manual will no doubt outline this for you. Make sure the gasket is facing the right direction. You might want to check your head for straightness with a straight edge. If it's even slightly warped, put it on a piece of glass with some 400grit sandpaper on it and rub the head on it with a figure 8 pattern to flatten it out. You may even have to start with heavier grit if it's warped bad enough. You MUST use a torque wrench and torque it to specs.
JBJ

 

[michiganman18]

Re: Head Gasket Rapair on 1972 Johnson 9.5

Any one know the torque specs?

 

[Rick.]

Re: Head Gasket Rapair on 1972 Johnson 9.5

OMC (1973) manual says 96 to 120 inch pounds. Rick.