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Have a LTS2000 bought used from backyard repair shop guy seem to know his business / however when i started using mower it ran fine for about 45 min. after that started running high & then low like running out of gas/ gov armature fluctuating repeatedly some back firing and stalling / choking out/ leave for a bit would start back up run fine for 5 min then start all over again /
Had carb & sensor replaced" brand-new" started up ran fine how ever got home ran it for around 15 minutes and died out tried starting it no fire just turn over waited 5 min & tried it started up ran for a bit then started choking outgain left it for like 20 minutes came back it started right up ran like a champ 5 minutes later starts choking out again just like it did prior to installing new carb & sensor.
Plenty of fuel through line to carb air filter new, all throttle arm's work nothing sticking outside when using throttle, new fuel filter & as stated fuel lines are clear.

My question is would the ignition switch have anything to do with this?
or coil since new carb & sensor

A few years ago, when my LT1000 lawn tractor would stall out after running awhile, I found that the choke butterfly was stuck in the closed position, so it was running rich. I added a hardware store spring to help the butterfly open.

Hi, Check the gas cap vent for plugging!

fishingman48 said:

Have a LTS2000 bought used from backyard repair shop guy seem to know his business / however when i started using mower it ran fine for about 45 min. after that started running high & then low like running out of gas/ gov armature fluctuating repeatedly some back firing and stalling / choking out/ leave for a bit would start back up run fine for 5 min then start all over again /
Had carb & sensor replaced" brand-new" started up ran fine how ever got home ran it for around 15 minutes and died out tried starting it no fire just turn over waited 5 min & tried it started up ran for a bit then started choking outgain left it for like 20 minutes came back it started right up ran like a champ 5 minutes later starts choking out again just like it did prior to installing new carb & sensor.
Plenty of fuel through line to carb air filter new, all throttle arm's work nothing sticking outside when using throttle, new fuel filter & as stated fuel lines are clear.

My question is would the ignition switch have anything to do with this?
or coil since new carb & sensor

Click to expand...

This happened with my Craftsman tractor. Tried everything. Finally someone mentioned the digital Service Reminder / Hour meter. It is on the dashboard of the tractor. After checking it we could see that it wasn't running right. We replaced it and the motor never died again. How a little thing like a timer could cause soo much trouble is mind boggling!

what is the exact model of the engine and tractor?

shadetree#1 said:

what is the exact model of the engine and tractor?

Click to expand...

Craftsman Garden Tractor 26.0 HP 54" mower Model 917.276882

What is the model, type and code of the engine?
Quite often the original engine is not always on the tractor especially when purchased used from a BACKYARD REPAIR SHOT.

Kohler Twin Cylinder 26 hp Pressurized oil system.

shadetree#1 said:

what is the exact model of the engine and tractor?

Click to expand...

Craftsman LTS2000/ 17 HP. OHV / Model 310707 / Type 0137-E1/ Code 0111162D Riding Mower

sparkyee said:

Hi, Check the gas cap vent for plugging!

Click to expand...

yeah did that, same thing when cooled down will run again for a while then die out again

shadetree#1 said:

What is the model, type and code of the engine?
Quite often the original engine is not always on the tractor especially when purchased used from a BACKYARD REPAIR SHOT.

Click to expand...

Yeah, your right on motor it was switch off another as original had blown motor / i did find the coil wire to spark plug was damage since did not have one i cut & wrapped the wire around tip seemed to of worked as started up but thinking once heated up may be failing so ordered a new one & see if that helps/ still looking at starter solenoid though maybe wrong but?????
Craftsman LTS2000/ 17 HP. OHV / Model 310707 / Type 0137-E1/ Code 0111162D Riding Mower

ghosthorse said:

Kohler Twin Cylinder 26 hp Pressurized oil system.

Click to expand...

If you're trying to tell me what's on it don't know as replace w/
Craftsman LTS2000/ 17 HP. OHV / Model 310707 / Type 0137-E1/ Code 0111162D Riding Mower

Cusser said:

A few years ago, when my LT1000 lawn tractor would stall out after running awhile, I found that the choke butterfly was stuck in the closed position, so it was running rich. I added a hardware store spring to help the butterfly open.

Click to expand...

Thought at first it may have been Carb. as original on it, however had a new one installed & doing same thing.
Whatever it is it's heating up to a certain point then shutting down till it cools off then will run again if left along for a while. i found the magneto coil to be damaged however upon rigging wire motor started but ordered a new magneto. But as stated after a short period of around an hr. Or less it shuts down? / Wondering if carb solenoid wire has short? one step at a time i guess till i find the culprit! lol!

ghosthorse said:

This happened with my Craftsman tractor. Tried everything. Finally someone mentioned the digital Service Reminder / Hour meter. It is on the dashboard of the tractor. After checking it we could see that it wasn't running right. We replaced it and the motor never died again. How a little thing like a timer could cause soo much trouble is mind boggling!

Click to expand...

Be honest with you i really don't think it has anything like that, My DLT 3000 has a voltmeter on it but that's about it as well.

Appears to be Single cylinder Briggs with the side mounted gravity flow up front fuel tank. did not look at the tractor model to see fuel tank location, just a guess.

Have you tested with another gravity fed fuel tank connected to the carb YET as suggested?

If not use a external tank and if it quits again you might have a bad or intermittent connection to the Anti backfire solenoid or the float/or needle sticking closed on the carb.
Does it have the ABS solenoid on the bottom or side of the carb?
I sometimes remove this solenoid or just loosen if after unplugging the wires to see if the carb bowl will drain gas.
To make sure we have a fuel issue instead of a ignition issue take off the air filter and as soon as the engine quits running, give it a prime of fuel (spoonful of gas directly into that carb throat intake. The plastic carb throat on that one points straight up so an easy prime. If it don't immediately re-start for few seconds the FUEL issue is toward the carb or ignition spark related.
You say you have a new carb on it, but if the wiring to the solenoid on the fuel bowl is erratic the engine will quit running.

Also you can have another spark plug readily available (does not have to be same type as is in the engine)The engine plug should be a R12 type and immediately pull of the spark plug wire connect and ground the spark plug and crank and look for spark.