Cub XT1 50" Shuts Down when PTO is Engaged

[skippymud]

Just a though. Look at the right valve cover as if you were sitting on the seat. There is a hose coming out of the top of the valve cover that connects to the fuel pump. Make sure it is connected. Could have other fuel restrictions but have seen the hose split and/or get disconnected while doing other work, and then get forgotten to reconnect.

Hi ILEngine

I always appreciate your feedback - Thanks. What is that, the impulse line which drives the diaphragm inside the pump? It's on my left as sitting on this now-POS. I checked it and it has not been messed with and appears to be in very good shape - Still pliable and not rotted or hard. The fuel filter remains full and appears to be feeding the pump just fine. I also tried running the engine on full choke to see if there is an air leak - No change. If I wait just 30 seconds after it dies, I can start it back no problem, then of course it dies as shown in this new VID. I also loosened the gas cap to see if the air hole was clogged - Nope

 

[ILENGINE]

I was talking about the pulse line. Looks OK in the picture. Fuel flow restriction some place. May need to remove the line between the fuel pump and the carb, and crank the engine to check fuel flow from the pump. Depending on where the fuel tank is located you maybe able to disconnect the line on the fuel filter side and hold the end down into a container and check flow from the tank to make sure you have a fuel stream. So either a restriction between the tank and the pump. Pump not working correctly, or something blocking flow into the carb float valve.

 

[skippymud]

Thanks ILEngine. What timing for this to happen just when the PTO does not engage properly. Oh well

"Fuel flow restriction some place" for sure, and I will find it. Will check the output flow from the pump to the carb first to ensure consistency

 

[kjonxx]

plugged gas cap

Hi ILEngine

I always appreciate your feedback - Thanks. What is that, the impulse line which drives the diaphragm inside the pump? It's on my left as sitting on this now-POS. I checked it and it has not been messed with and appears to be in very good shape - Still pliable and not rotted or hard. The fuel filter remains full and appears to be feeding the pump just fine. I also tried running the engine on full choke to see if there is an air leak - No change. If I wait just 30 seconds after it dies, I can start it back no problem, then of course it dies as shown in this new VID. I also loosened the gas cap to see if the air hole was clogged - Nope

Water in the carb? Sounded like it was starving for gas

 

[ILENGINE]

plugged gas cap

Water in the carb? Sounded like it was starving for gas

It was. I have seen water in carbs appear to do some strange things.

 

[DinosaurMike]

Safety switches could have been defeated by the previous owner. I "fixed" the seat switch on my Husqvarna YT42LS tractor so the engine will keep running when I get off the seat. Was a real pain having the engine stop when I went to close the garage door. The engine continues to run with the PTO engaged when I get off the seat. The ignition switch has a built in "mow in reverse" position. TMI after the first sentence.

 

[ILENGINE]

Safety switches could have been defeated by the previous owner. I "fixed" the seat switch on my Husqvarna YT42LS tractor so the engine will keep running when I get off the seat. Was a real pain having the engine stop when I went to close the garage door. The engine continues to run with the PTO engaged when I get off the seat. The ignition switch has a built in "mow in reverse" position. TMI after the first sentence.

You do realize that you could of turned the deck off, and set the parking brake and then got off and closed the garage door and the engine would of keep running.

 

[DinosaurMike]

Safety switches could have been defeated by the previous owner. I "fixed" the seat switch on my Husqvarna YT42LS tractor so the engine will keep running when I get off the seat. Was a real pain having the engine stop when I went to close the garage door. The engine continues to run with the PTO engaged when I get off the seat. The ignition switch has a built in "mow in reverse" position.

You do realize that you could of turned the deck off, and set the parking brake and then got off and closed the garage door and the engine would of keep running.

Thank you, I did not know that. I read the manual when I bought the tractor, but obviously forgot what I read.
I do not engage the PTO until I am ready to use the attachment; it was just something I found out when I got off the tractor to grab a branch with the mower engaged. Normally I shut off the PTO in that situation.

 

[skippymud]

It was. I have seen water in carbs appear to do some strange things.

plugged gas cap

Water in the carb? Sounded like it was starving for gas

Surely starving for fuel. kjonxx, I had checked the fuel cap by loosening and that isn't it. The same BS continues

But I've been somewhat lazy in the last week - Argg! I still must check the fuel output from the pump to ensure consistency. As ILEngine states, there is blockage somewhere, and I believe that to be so

Ken

 

[skippymud]

Turned out to be a fuel delivery problem. I rebuilt the Carb and flushed the fuel system and she works. Thanks all! - Ken