throttle bushing

[sqrlgtr 552]

Have a couple original K series Kohler carbs that I would like to replace throttle shaft bushings in and was wondering where a good source would be to get them? Also, wouldn't turn down any advice or tutorials on best way to go about doing this. I don't have them in front of me right now but wondering how hard getting old bushings out would be? Thanks in advance......

[Treepep 562]

 

 

Easiest is to send to the Bear @ebinmaine.    

[sqrlgtr 552]

Good deal, didn't realize someone on here rebuilt them. Will have to get ahold of him if I decide not try it on my on...

[Achto 27,565]

1 hour ago, sqrlgtr said:

wondering how hard getting old bushings out would be?

 

If they are original untouched carbs, there will be no bushings in them. There will be a recess in the carb to install repair bushings. The bushing size is 1/4" i.d. by 7/16" o.d by 1/8" thick. I purchase mine from Ace Hardware as 1/4 x 7/16 x 1/16 and use 2 of them stacked together. I do believe that they are labeled as thrust washers and found in the pull out plastic drawers of hardware.

[sqrlgtr 552]

1 hour ago, Achto said:

 

If they are original untouched carbs, there will be no bushings in them. There will be a recess in the carb to install repair bushings. The bushing size is 1/4" i.d. by 7/16" o.d by 1/8" thick. I purchase mine from Ace Hardware as 1/4 x 7/16 x 1/16 and use 2 of them stacked together. I do believe that they are labeled as thrust washers and found in the pull out plastic drawers of hardware.

I believe they are untouched. I just assumed they had a bushing in there may not be as big a project as I was thinking. Looks like worst would be getting the butterfly disc (for lack of better terminology) off???

[ebinmaine 67,417]

5 hours ago, Treepep said:

 

 

Easiest is to send to the Bear @ebinmaine.    

 

Hi. Bear here. 🐻 

 

 

6 hours ago, sqrlgtr said:

Have a couple original K series Kohler carbs that I would like to replace throttle shaft bushings in and was wondering where a good source would be to get them? Also, wouldn't turn down any advice or tutorials on best way to go about doing this. I don't have them in front of me right now but wondering how hard getting old bushings out would be? Thanks in advance......

 

This is only for big block carburetors. 10 HP and up.

 

 

As per usual I happen to have a couple of Kohler big block carbs on the bench for repair. 

I'll put some pics together so you can see what you need. 

 

 

 

[sqrlgtr 552]

Ok so the carbs off of the k161 and k181 dont have recess for the bushing. I have 2 of those and 3 that came off k 301,321and 341. Im not in need of them but was wanting to rebuild and put back for future use.

[ebinmaine 67,417]

OK here goes...

 

Most Kohler (and the couple Walbro) carbs I've seen have a one piece throttle shaft. 

 

The throttle blade screws must be removed to get the shaft out. 

 

 

Here's the throttle blade (butterfly)  screws that need to be ground out. 

 

 

If you look carefully at the BACK of the screw they're "forked" or staked in place to prevent them falling out. 

 

I use a Dremel and a diamond chain saw sharpening bit to CAREFULLY AND SLOWLY grind away the whole back of the screws. 

 

 

The older (60s?) Carter (maybe Kohler?) carbs you do NOT need to grind out the throttle blade (butterfly)  screws. 

Here's why:

 

The top of the throttle shaft  simply unscrews. 

 

 

Leaving the bore that accepts the washer  right open. 

 

 

 

 

 

 

 

 

 

I believe this is a Hillman part number. 

 

 

If you decide to send them to me I have all the parts right here in stock. 

 

 

 

The only thing I ask is that one becomes a Supporter of Redsquare. 

It helps @nylyon keep the best site on the interwebs Goin strong!

 

I charge for parts and chemicals only. 

 

I do not charge Redsquare Supporters for labor.  

 

USPS can get a carb across the country for about $10 to $12. 

 

Figure around $45 to $50 total depending on what you need.....

 

 

[sqrlgtr 552]

Thanks for the pics and info. I may send some your way in the future if I decide I don't want to try it myself. I'm really not in need of one at the moment but wouldn't mind having a spare ready to go.

[ebinmaine 67,417]

2 minutes ago, sqrlgtr said:

Thanks for the pics and info. I may send some your way in the future if I decide I don't want to try it myself. I'm really not in need of one at the moment but wouldn't mind having a spare ready to go.

 

 

Try it on the 10 HP carb first. 

Those are more common and easier to replace. 

If that works out.... awesome! 

[Handy Don 12,210]

2 minutes ago, ebinmaine said:

 

 

Try it on the 10 HP carb first. 

Those are more common and easier to replace. 

If that works out.... awesome! 

Have you done any experimenting on the 7, 8, 9 HP Kohler carbs to fix throttle shaft wear? If yes, what did you learn?

[ebinmaine 67,417]

11 minutes ago, Handy Don said:

Have you done any experimenting on the 7, 8, 9 HP Kohler carbs to fix throttle shaft wear? If yes, what did you learn?

 

We only have the two 8 HP Kohlers on Trina's mid 60s machines. 

 

They've both been rebuilt and didn't need shaft to bore repair.  

 

 

 

[Handy Don 12,210]

Just now, ebinmaine said:

We only have the two 8 HP Kohlers on Trina's mid 60s machines. 

They've both been rebuilt and didn't need shaft to bore repair.  

So far, the shaft/bore wear on mine seems slight and I’m not noticing signs of air infiltration. But starting at the next BS, I’ll be looking for a backup carb and being VERY fussy about it.