K301AS engine rebuild
 

Hi guys:

I'm getting ready to start rebuilding a k301as out of a 123. Other than removing balance gear and governor gear, anything else I should replace

Thanks Thad

You're not removing the governor gear are you?

I think he means he’s replacing the governor gear? Maybe with a steel one?

Maybe but I'm just making sure.

He says"gear" not "gears" most that have balance gears have 2 of them I haven't seen this but have read where some have 3 balance gears... (Mostly 16hp I think)

You certainly want to pull both balance gears and leave them both out. Maybe he doesn't know that the governor gear is " across the cam" from the balance gears?

I'd leave the governor gear in. If you want to replace it, that's a good idea.... but it kind of needs it. :biggrin2:

You should replace:
Piston (and rings)
Connecting rod
Valves
Bore it
Grind the crank
Grind the valve seats
Bead blast and plane the head
And obviously, all gaskets and seals

Replace as needed:
Valve guides
Check the camshaft
Rework the lifters and adjuster bolts as necessary
Governor gear
Governor control rod bushing
Check the arm on the governor control rod. Weld it if needed.


Remove the balance gears and chuck them in the scrap.

yes i mean the governor gear will get replaces with a new one and balance gears will be removed

Great. I wasn't sure what you meant by the way you posted your comments.

This will be very helpful for me in the future, thanks again!
It's good to see what really needs to be done.
Kevin