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Discussion Starter · #1 ·
I just rebuilt the carb on my 8122 K301s. It seems that the PO has played with the settings on the carb to get it to run. So I need the stock settings if there is such a thing. I have it running. Just doesn't seem to be 100%. I also need to know the correct name for each adjustment screw.

Topscrew name? Guessing piolet

side screw name on the side guessing idle fuel? not sure

I looked up in oldgravelys but didn't see any OEM settings for them. Any help would be appreciated.

Like I stated before. I is running, and strong, but it seems that the gov kicks in and out real fast at low/mid throttle, in the upper R's it seems to be better but that could just be masked by the rmp. Maybe I need some point work? :greendr:
 

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The screw on top is the main or high speed mixture screw. THe one on an angle is the idle mixture screw.

I start with both 2 full turns out from seated. That should get it started. Too lean a mixture will burn the exhaust valve so the mixture adjustment is important. Too rich will carbon up the combustion area.

Adjust the idle mixture screw for highest idle speed. Adjust the main for smoothest running. If you want to get the main close, start it and run the throttle up to near max. Screw the main in until it starts to falter and then back it out 1/4-1/2 a turn. Run it for a while and see what happens. It is not unusual for the settings to change a bit as accumulated dirt and corrosion breaks free.

If the tractor seems "cold blooded" in the morning, back out the idle mixture screw 1/16 of a turn.

The fuel mixture requirements of the engine may change from summer to winter. The most I ever had to do was adjust the idle mix a little richer in the winter. YMMV

It is not called pilot jet as it is not a Mikuni motorcycle carb. That carb is just not sophisticated. It is the cheapest made carb that will still do the job.
 

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Discussion Starter · #3 ·
That seemed to help it out a little. However tuning it in the dark I noticed that the exhaust gasket is done and it would spit out a flames every now and again. Now to figure out how to remove a 25 year old rusted exhaust bolt from the head to replace the gasket. So far I soaked them in PB blast.
 

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Yesterday my K241 was acting like everything was wrong with the carb!!

I got it in the shed, fired up the woodstove, tore the whole carb apart.

Back together, all clean, no change!!

I figured I would check the points, they looked OK.

I went to check the voltage at the coil with a meter and the wire fell out of the crimp on end!!

I crimped on a new connector and all was well.

I will check wires more frequently when there is a problem.
 
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