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Old 11-02-2015, 11:16 AM
curleelawncare curleelawncare is offline
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Join Date: Jan 2012
Location: Raleigh, NC
Posts: 34
Need help trouble shoot Toro Grandstand

Recently while mowing my unit has developed an intermediate problem. 2012 Grandstand with 740 hours. Mowing along as normal and all of the sudden the engine shuts down for a split second and the PTO stops turning. I let go of the controls and the engine fires itself right back up and I pull PTO switch and continue on. Sometimes it doesn't happen everyday and others it happens several times per day. It's like I turned the start switch off and back on quickly. Where do I start trouble shooting? I changes the air filter and fuel filter thinking it may be starved for air or fuel. No results. Any ideas?
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Old 11-02-2015, 12:03 PM
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BigFish BigFish is offline
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Join Date: Jul 2008
Location: chesapeake, va
Posts: 2,527
More than likely in the OPC safety circuit. Hit the toro site up fer a manual/wire diagram.
It ain't rocket science! far.

'Course if yer house has more wheels than yer truck...
" Old age ain't for sissies "
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Old 11-02-2015, 12:56 PM
SP55669 SP55669 is offline
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Join Date: May 2015
Location: Missouri
Posts: 65
Yep, safety switches. When you find them you can test them with a ohm reader if you have one. Also. the other day I thought i had a bad switch going out.

But, it turned out to be the connector was loose. So i had to use a safety tie to keep it in the socket snug. So that's something to check.
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Old 11-02-2015, 07:57 PM
ricky86 ricky86 is offline
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Join Date: Aug 2008
Location: Monmouth Cty N.J.
Posts: 1,602
Best place to start is a "Wiggle test". Go along the harness and just wiggle it while it's running. Do the connections also. One at a time and take your time

If everything shuts down, you might want to pay particular attention to the main battery circuit. The should be a diagram in the owners manual, or as Fish suggested, check Toro. One thing I have been seeing, although on unit with higher hrs, is grass accumulating behind the fuse block. You can remove it from the frame with a screw driver and a wrench.


Just bring it in for warranty work. 5 yr / 1200 hrs warranty
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