Cub GT2521

[mhart]

Hey guys

Have been mowing fine with this mower all year. Today it was mowing fine when all the sudden the blades stopped. I was then able to re-engage them and mow for another few minutes. They then cut out again. This happened repeatedly. Sometimes allowing me to mow for 5- 10 minutes, other times it would cut off again right away. Seemed to not be affected at all by grass length or whether I was mowing or just sitting stationary. When they were engaged it seemed to mow fine.

Any thoughts.

 

[rcbe]

could be several things:
a touchy or failing seat safety switch. if you sit "light" on the seat, that switch can cut in and out.
excessive air gap at the electric PTO
low battery voltage or inadequate alternator output
frayed pto wiring

 

[94BULLITT]

could be several things:
a touchy or failing seat safety switch. if you sit "light" on the seat, that switch can cut in and out.
excessive air gap at the electric PTO
low battery voltage or inadequate alternator output
frayed pto wiring

or a PTO switch

 

[mhart]

Thank you guys, agree it seems to be something electrical. Any simple way to narrow this down and figure out exactly what is going on.

Thanks, Matt

 

[rcbe]

1.94bullit made the best catch by naming the PTO switch as a potential culprit. Start by running the machine with deck engaged and then "jiggling" the switch knob/control. if the deck cuts in/out at any time, replace that switch with an OEM replacement (mark your wires first so you know where/how they hook back up - pixs do help).
2.If yer light in the butt, help the seat switch stay engaged with a piece of patio block or similar.
3. check yer batt voltage with machine turned off - should read 12.8 vdc at the posts. lower than that indicates a tired/failing battery - if older thn 3 yrs, time to replace. have new one LOAD tested before installing.
4.Frayed PTO wiring - remove deck - machine shut down. safety glasses/trouble light or flashlight. closely inspect PTO wiring pigtail from coil thru frame opening where leads merge with main harness -examine closely for any insulation scrapes/etc. that could allow intermittent electrical contact with other objects.(edit-whups - forgot yer machine has a horizontal engine... but you get the PTO wiring idea.)

By the time you complete the above investigations, chances are you will have a very good idea what is really causing your PTO problem. Good luck.