key switch not working in cold weather

[soldvette]

hello, I have a b2150 hst and I am having a problem during cold weather operation. The tractor will start just fine and I let it warm up for several minutes before operating. The problem that ive been having occurs when I try to shut it off, the key switch will not work. This has happened twice this year and both times I had to use the manual fuel kill switch. Then both times I tried to start the tractor right after and it doesn't even turn over. The strange part is if you let it sit for a few minutes it will start and shut down like normal. Anyone else have this problem? thank you for your time
TJ

 

[85Hokie]

Sounds to me that something "in" the mechanics of the switch is bad, going bad........a switch is simple a set of contacts that allow electrons to flow across.
By chance - any signs of mice chewing on the wires? I would look at buying a new switch,

found this statement :
" bought a B2150 4 years ago, it is a 1987 and it has 1900 hrs on her, she came with a 60 inch belly mower, and turf tires, I paid $6,000. I have since sold the belly mower on E-bay for $800. and have added a 48" scraper blade, bush hog and front end loader. The only issue that I have had with it is the key switch will not always shut off the engine and I have to pull the fuel cut off lever to shut her off"

seems that someone else has had the same problem.

looking up the switch.......ouch ....$75 bucks......
http://www.messicks.com/cart1.aspx?pn=37410-59110



maybe someone has a better thought.......

 

[North Idaho Wolfman]

Sounds to me like it might have a bad stop relay or fuel stop solenoid.
I also think there is a interlock that will not let the tractor restart for a short period of time to allow the fuel stop solenoid to work.