You didn't say weather the K301 had battery or magneto ignition? If it has battery ignition, it's best to use a timing light to set the ignition timing. Also the valve lash (cold) could be off a little? As far as the bolt vs the nut on the flywheel, Kohler made a change in the 1980's to all the crankshafts and dropped the external threads (nut) for internal threads (bolt). You could check the flywheel key slot on the old crankshaft to see if it is in the correct position on the new crankshaft.
Wheel Horse Guy;192261 big snip Bertsmoble1 said:OK
I obviousy did not read your post carefully enough.
There should never ever be flames coming out of the muffler.
What I said is what is allowable with neither muffler nor header pipe on.
Flames from the muffler without a lot of missing will usually be a main jet way to big
Same as Rivets.
Has to be late timing or way too rich mixture
I'm thinking one of two things may be causing the problem. Valve timing off or fuel mixture too rich. Here's a manual which may help you. Not to be a smart ____, but are you sure the used parts are correct?
http://www.mymowerparts.com/pdf/Koh...al-K91-K141-K161-K181-K241-K301-K321-K341.pdf
OK
I obviousy did not read your post carefully enough.
There should never ever be flames coming out of the muffler.
What I said is what is allowable with neither muffler nor header pipe on.
Flames from the muffler without a lot of missing will usually be a main jet way to big
Same as Rivets.
Has to be late timing or way too rich mixture
I've also ran into the same problems when someone has replaced the Kohler ignition coil with a cheap automotive style coil?
Bertsmoble1 and Polaraco, one carb is new and runs great on my other tractor. Only one adjusting screw, but I will try it again.
Cashman, I will set the timing with the light.
Thanks all, I will have to wait for a warm day to do this work.
Rivets, I will take the muffler off my other tractor and try it. I live in a small town too, never any verbal warnings,
only tickets for loud pipes, among other things, on my 383, 4 barrel, Hurst 4 speed 1968 Road Runner. That was
in 1973 and I was 17. Now I am 60 and I still have the Road Runner in my garage, sitting since 1979. All original
and waiting to be restored. Since then I only drove it once, in 1994, to the house we are in now and I was 17 again.
Figured I better wait until I was older to restore it or I would start getting tickets again. Still not sure its time.
What Mopar did/do you have?
Robert
Did have. First a 1970 Blue Challenger then graduated to a 1969 Yellow SuperBee. Bought them out of the bone yard, rebuild and painted, raced at the local drag track grudge night, sold for a 100% profit. SuperBee paid for the fist year and a half of college. Today drive an SUV 6 cylinder, not as much getup and go, but gas milage is better.