Kohler K321 on a 1450 backfires and stalls.

[mikeangelini]

Hello all, Thanks for the help so far with my 'new to me' tractor.

Yesterday, after mowing at full throttle for about 35 minutes, the engine will suddenly start to backfire badly, (Fire shooting out of the muffler.) and then stall.

It wouldn't start back up right away. It would turn over, but not start.

About a minute or 2 later, it would run again.

Could it be heat related? This happened last week after around the same amount of run time.

Thanks,

Mike

[Shaner]

it could be your coil is going bad. check to see if its getting hot when the tractor is running. thats usually a sign of the coil going bad. your condenser might also need replacing.

[mikeangelini]

I will check the coil for heat. Should it get hot right away if it is going bad?
Run the engine at idle or fast?

Is there a way to check it with an ohm meter?

Thanks,
Mike

[cmatthew]

wouldnt hurt to just replace it. and if your going to replace the coil you gots to replace the condenser. i think i paid around 40 bucks for a coil and a condenser from our sponsors. the one on there was original.

[ole 147]

Hold up there,

Before changing the coil I would check the carb and make sure it is getting gas.
My 147 use to do that when I would go up my hill and my gas tank was low.
I gave it a rebuild on the carb but haven`t run low on gas since to see if it still back fires when I run out of gas under load. Kholers like to do that.
Next time it does that, check to see if you have gas at the carb. just to make sure.
It could be vapor locking to the 1450`s run a little hotter than the older mods.
Hate to see you buy a coil and not need it.
It`s also a good idea to check and make sure the mice didn`t build a nest between the eng and the tin also check the screen on the back of the engine to be sure it isn`t clogged up. Seems like no one checks there.
I guess thats it. Good Luck.
You should have seen the rats nest in my 1450
Fire shooting out of the muffler I forgot bout that, check the needle n seat. If that isn`t seating could be a problem too.
I hate it when that happens.
Oh yea when it stops check to see if you have spark if it don`t start up. If you are getting spark go for the above.
Don't jump to conclusions check it out before you run out and buy stuff you don`t need, but then it still wont run right.
I`m not saying it`s not the coil but check it out you can fix it faster that way, n get more seat time.

ole 147

[ajgross]

Actually, I bet his exhaust valve is sticking. Try running a little bit of Marvel's Mystery Oil in your gas. Only about a cap full per tank. If it is your valve sticking, that should help.

AJ