Kohler Carb #30 Issue

[pfrederi 17,734]

Picked up a #30 carb some time ago not having an immediate need went into a box.  Now I want to use it non my C-160-8 with the overhauled motor.  The darn throttle shaft will not budge...  have soaked it with various snake oils can't move it with vice grips....Appears some PO put a bushing or the top of the shaft..you can see a bit of bronze peaking out, also welded the throttle arm.  Tried a little warmth (not real hot) but nada.  Butterfly is turned to much to remove the little screws unless i just grind them off but still not sure that will free the shaft.  Thoughts Smart people....

 

 

[ebinmaine 67,455]

I've put  bushings in the top of quite a few carbs. It's a loose enough fit that you certainly do not need to drive the shaft down through or anything like that.

 

If it won't move either direction I would begin to wonder if someone got some Loctite down in that lower bushing housing.

 

I think a little more heat shouldn't hurt much. But obviously, don't be too ambitious on that.

 

 

I would be prone to trying to lock the carb into a vice and use large pliers or some such, to try to turn that throttle shaft towards the "more open" direction.

More that turns open, the more freedom there should be for that butterfly.

 

[wallfish 16,994]

Back and forth repeat repeat repeat oil the top too. Back and forth repeat. You could try prying lightly on the butterfly in the same direction and at the same time.

That shaft should also move just a tiny little bit up and down too so you can trying prying it up and tapping down on it too.

[Handy Don 12,216]

1 hour ago, pfrederi said:

Picked up a #30 carb some time ago

I think you may have discovered why it was available! 

[ri702bill 8,316]

STILL has more potential than an offshore generic imitation one....

[lynnmor 7,305]

Clean away the products that you tried with acetone. Let it soak with the acetone and try moving it again.  If that doesn't help heat the shaft rapidly to over 300 degrees and see if it will move.  The reason for quickly heating it is so you don't over heat parts that may be destroyed.  What I suspect is the same as ebinmaine, possible super glue use.  It appears that the screws might come out with a right angle Phillips screwdriver.

[Ed Kennell 38,158]

Can you get a short philips bit and wrench on the screws?    If you can get the plate off, then use/make a slide hammer to pull the shaft and bushing.

[Bill D 1,920]

My guess is someone used red loctite on the screws for the throttle butterfly. It ran down the shaft, pooled at the bottom and locked the shaft in place.  Heat up the bottom of the carb where the pocket for the shaft is.  I think that will free it up.  Then you can get the screws out, take the shaft out and clean everything up.

[ri702bill 8,316]

8 hours ago, Bill D said:

My guess is someone used red loctite

The only way I know to remove cured high strength Loctite is with heat.....

[WHX?? 48,815]

8 hours ago, ri702bill said:

The only way I know to remove cured high strength Loctite is with heat.....

Yes the red stuff Bill... unless it was put on greasy oily threads. 

Can't imagine why they would have used green? They ain't kiddin when they say there is no known way to get that off...

[ri702bill 8,316]

46 minutes ago, WHX?? said:

Can't imagine why they would have used green?

One variant of green Loctite is Stud & Bearing Mount.... it is designed to wick and flow into minescule places....We used to use it to seal a splined press fit joint on an automotive 2 piece product that was a source of pressure leakage during the final tester Leak test.....

We made racks to hold 50 or so assemblies... spritz them on Monday, use them on Tuesday.

[pfrederi 17,734]

Thank you all!!  Applied a bit more warmth and applied more acetone/atf bug juice and it broke free.  Actually moves pretty well now after a lot of back and forth.  Going to get the screws out of the butterfly and pull the shaft soak it berrymans then some time in the ultra sonic cleaner...