K-301, what to do ?

[dbuck]

MJS, You are Welcome. Glad I could provide a little info.

[mjsoldcub]

The parts gathering has begun, soon as i know this snow stuff is over the 12 is getting pulled...I have a question; i believe that the 12hp k series came with #26 carb, correct?? Does anyone know the part # and best place to purchase the throttle shaft rebuild kit?? Mine has the extra slop in it and i thought there was either an enlarged throttle shaft that it could be drilled out to fit or a type of bushing kit available??? Any info greatly appreciated..
Thanks

[mickb72]

Hello. call Lakota Racing they have shafts and bushings. Mike

[bocephus1991]

You can get a bushing for the throttle shaft at a hardware store.
The Servalite part number is: ST814-2


Size is 7/16"x1/4"x1/16"

also the butterfly screw size is 3-48 x 7/32"
A 3-48 x 1/4" works also

[austin8214]

Originally Posted by bocephus1991

You can get a bushing for the throttle shaft at a hardware store.
The Servalite part number is: ST814-2


Size is 7/16"x1/4"x1/16"

also the butterfly screw size is 3-48 x 7/32"
A 3-48 x 1/4" works also

Good info!

[mjsoldcub]

Thanks fellas...yes i had my go around with the butterfly screws already..if you read the beginning of this thread it talks about how when i first bought the tractor it was running lean and the head gasket was leaking..i just needed to get it through winter for plow duty...when i pulled the head i found the series of events; screw from throttle butterfly came out and got eaten, blew out gasket, plate hanging up in venturi bore..glad it was brass...i dont know how long p.o had it that way but i dont think the tractor was run much, but i put in new stainless ones, loctited(red) and nutted on the back...couldnt find a way to peen them over, or brass ones..but this throttle shaft has the 30+yr slop in it, and as im about to pull motor for rebuild i would like to snug it up..so these bushings; just drill out to?? And then press in bushing, and then put the shaft in?? I thought there was an oversized shaft available?? I do like the idea and price of the hardware store bushing though..does everyone agree that the "ebay" (you know what i mean) kits are a good buy?? I would really like to do the "new style" piston and rod, and machine for bearing inserts as dbuck suggested, but if those kits are real good, im all about saving some money....thanks
Mike

[J-Mech]

You can get brass screws in a pack of 100 from McMaster Carr for a couple bucks. Then you never need any more, and probably about the came cost as your stainless ones. The nuts are a bad idea. I'd take them out, and grab the threads with some vice grips and smash them.

No reason for bearing inserts unless your going to be running the motor really fast. The E-bay kits are being used by several member on here. Most important part is the machine work. Doesn't matter how many $$ you spend if the block isn't prepped correctly.

The Servalite bushings drive right into the bore. (AFAIK, all the carbs had a larger diameter hole at the top of the carb. I'm not sure if it was for a seal, or future use for a bushing.... or if all the carbs had it.) If you need a new throttle shaft...... check prices. It may be just as cheap to buy a new/another carb.

[mjsoldcub]

Thats good to hear, thanks...yeah this is a good shop, trust me...i am thankful theyre letting me bring my little air cooled single popper in there!! I will check into those bushings..no shaft is ok, actually i probably wouldnt even mess with it, but im thinking might as well snug her up...i was debating on the butterfly screws also, i have alot of access to stainless hardware, not so much to brass, and i was in a hurry as i needed to plow with it...they did hold good, but i will check with mccarr (have the big book downstairs)...
Thanks

[dbuck]

I would use brass screws. If I remember correctly those screws are 3-48's. Any good hardware store ought to have them, along with Hillman bushing # 58087.