K301 carburetor problem

[cafoose 3,354]

I have a 12 hp K301 carburetor with a sloppy throttle shaft. I've read that you must grind off the end of the throttle plate screws before removing them to avoid breaking the screws off. How in the world do you get in there with a grinder? Also, I've read that you should stake the new screws in place to keep them from backing out. How is that accomplished with such little room to work? Also, where would I get bushings and what size? I believe I would also need new screws for the throttle plate. What size and where do I get them?

 

[bottjernat1 2,190]

A dremel with a tiny cutting disc. I would spray them with pb blaster and just go back and forth with a snug screwdriver and work them slowly. most of the time they will come right out. There is a kit you can get with bushing i believe. ill see what i can find. This article may help https://www.onlycubcadets.net/forum/showthread.php?t=10329

Edited April 20, 2020 by bottjernat1

[ebinmaine 67,269]

I've done a few of these now. I use a Dremel with a tiny grinding stone or a diamond Stone like you would use for a chainsaw. Works slick to get in there.

 

Stock size on those bolts is probably something like a number 3 by 48 thread. I don't know the length off the top of my head.

I don't recommend getting an allen head. I would get something that you can bite a little easier like a Philips or even a regular bolt head.

You can stake them by going down through the choke and with a punch but you can also just use the appropriate loctite to hold the bolts in place when you're done.

 

@JCM or @pfrederi could tell you what size the washers are.

 

 

[pfrederi 17,663]

People say you can find them in Big box stores or good hardware stores..

 

[8ntruck 6,991]

Ace hardware stores have been listed as sources as well.

[roadapples 6,983]

Ace hardware does have them. I just use a small file. They're brass if original. I re-use them with locktite.

[cafoose 3,354]

for your quick responses

I just did some research and found this:

http://gardentractorpullingtips.com/carbfuel.htm#removeretainingscrews

I just put an order in to McMaster/Carr and added some other things I needed:

 

[squonk 41,021]

Don't try to get he screws out without grinding..If you snap one off you're gonna be pissed.

[ebinmaine 67,269]

Just now, squonk said:

Don't try to get he screws out without grinding..If you snap one off you're gonna be pissed.

I'll second that.

I have tried.

And failed.

 

The grinding takes just a little time and saves a ton of @#$_&-+()/   and work.

 

[cafoose 3,354]

45 minutes ago, squonk said:

Don't try to get he screws out without grinding..If you snap one off you're gonna be pissed.

No I already read about that Thanks for the warning though!