K241

[MalMac 1,332]

On a K241 that I was using everything running fine, then at full RPM it started getting that stutter. Started out every 1min or so then has gotten worse. I can not adj. it out of it. The carb was just cleaned and new rebuild kit and fuel filter. It ran like a champ for about 2 weeks. Not really sure whats going on. The only thing left in the carb that might be causing trouble might be the float? Starting to wonder if it might be electrical.

[Shuboxlover 481]

Fuel pump? :hide:

[MalMac 1,332]

Alright I took the carb off check and cleaned everything. Can't find anything that indicates a carb problem. Float level seemed fine. Then I went and checked to make sure it was getting fuel ok. That checked out.

Got everything back together with no luck it's still sputtering and hacking on at the upper Rpms. I tried readjusting the needles but it just does not seem to have any affect unless you go super lean or super rich. I checked the points and they seem to be ok. I am really at a loss here. I have checked everything that I am familiar with and nothing really seems out of place. Not sure what to try next. Oh yeah I did put a new plug in not that the old one was bad. Have good spark.

[boovuc 1,090]

It could be running too lean. Once it's hot and at max RPM, I've seen my KT do this same behavior. If your fuel filter and fuel pump are delivering as they should, rich the mixture up a little bit. Also not sure what you are using for fuel. All mine get hi-test. I have also questioned the amount of ethanol in some of the gasoline I have purchased at some discount gasoline outlets. I'll get pinging like crazy after a fillup that will continue until I get more gasoline. Then it goes away. <_<

BooVuc

Mill Hall, Pa

[Cody 277]

Check and make sure there is no water in the gas, also make sure the body of your condenser is grounded good. When it acts up try pulling the choke out slowly, not to far or you'll cause it to stall and see if it makes a difference. That should help decipher weather its fuel or electrical related. The vibrations of high rpm's could be causing you to lose connection some where, like the ground on the condenser.

[squonk 43,881]

Since he's adjusting the mixture with no effect unless he goes extreme lean or rich could it be a worn main jet nozzle or throttle shaft letting extra air in when the engine is vibrating at the higher speed?

[MalMac 1,332]

On this particular engine I had to replace the main jet nozzle. Along with replacing it I also put a new main needle in. I also checked the throttle shaft no problems there. When I had the carb apart I check to see if maybe the nozzle had moved or come loose. Everything looked fine. I was thinking that maybe it's the gas, but I put the same gas in another tractor and it does fine. Would a bad condenser cause it to do this? I know it's got a good ground. Was also wondering would a bad or worn ignition switch cause this? I am starting to run out of Ideas. Just from what I have checked or can see from outwardly appearances everything seems to be fine.

[stoneman 10]

can you rig a test light to your ignition and see if it flickers when the engine sputters? :hide:

[Anglo Traction 761]

If you can rule out any Fuel issues after the checks that the other Guys here have suggested to check, you may try swapping over a known good H.T Coil. It may be on it's way Out-to-Lunch.

[can whlvr 994]

i just had a magnum that i couldnt adjust the carb to get the missing out,it turned out to be the exhaust,i put a new stack on her and then a little tuning and its perfect now,may be its plugged up some

[tbbahner 28]

Might check your coil wires, I had a 14hp that would crap out at top end. Finally found the coil wires reversed.

[MalMac 1,332]

Ok, I changed the points and condenser. It went from sputtering to no spark at all. I changed the points back to the old ones and had spark. I kept the new condenser on and fired it up. It seemed to act better just not quite there though. I am starting to lean also toward bad gas. When I retrace when all this started happening it was after I refilled the tank with gas I had just bought. I put a higher Octane in. I wondering because the price of gas that the station I got it from is not selling as much if any higher octane and I got some crappy old gas that has been sitting sense all the gas prices went up. I did put some of the gas in another tractor without problems but I did not put as much in. I filled the tank up on the one I am having trouble with.

I drained the gas out of the tank and only left about a cup or two in. I then put an additive in to dry up any water. I have not tried yet to start it yet. I let it set overnight. I am still open for any suggestions and thanks for all the ones that have come in so far as I have tried them.

[tranders 0]

How did this turn out?

Did fresh fuel cure the problem?

[MalMac 1,332]

Well I think I have narrowed it down to bad gas and possibly a float problem.

I used it the other day with different gas and had a very improved performance. It's still trying to cut out but not near what it was doing. When it cuts out it is acting like it might be a fuel problem or I should say a fuel starvation problem. Thats why I am going to look at the float again. If thats not it I guess I'll start all over again.

[Cody 277]

Also try unscrewing the gas cap a little to verify the vent in the cap is not blocked, or remove the cap completely and try it.

[MalMac 1,332]

At the moment with fingers crossed. I think it was pretty much a bad gas issue. Some different gas and alittle Seafoam and I seem to be back to a smooth 3600. Now if the rain would give it a break I'll get her out and let her stretch her legs and do some grass cutting. Thanks everbody for all your suggestions.