Simplicity Sunstar 20 hp hydro, with 60" mower deck. It turns over but won't catch. Plenty of gas. pto switch is off. foot firmly on brake pedals. seat switch had been disabled by previous owner. this lawn tractor has run fine before for us. it has a Kohler Magnum 20 motor, 2 cylinders. When I turn the key, something is turning but it doesn't sound like the tractor does normally. Any ideas? Thanks. -J
If it's a Briggs motor its possibility the little electric solenoid on the very bottom of the carburetor isnt opening when the key is turned. Put a spoonful of gas in the plug hole Nd if it catches then dies then it's a fuel related problem
it's a Kohler Magnum 20 motor, 2 cylinders
Do the same for that engine also. If it starts then fuel delivery is the problem
ok I'll try that. thanks.
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Remove fuel line and see if there’s flow. Sounds like a fuel issue. Also check spark.
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Testimonial: "Replaced fuel filter. The carb side was bone dry and the tank side had gas. Still no start but I may need to dribble a little gas into the intake to get it to start to catch."
Mat need tune up -carb work -clean rebuild replace --or other safety
SOURCE: simplicity mower stalls when brake released
There is another safety switch connected to the parking/service brake. Check that one too. Sounds like its the one.
SOURCE: Mower deck will not engage.
you have sheared off the keyway either on the mandrel or pully on the engine
SOURCE: simplicity sunstar 20hp rear pto won't engage deck
your electric clutch may need adjustment. Take the hood off. Look behind the double pulley that's on the crank shaft. Behind the pulley is an electric clutch. You will need a .010-.015 feeler gage and check between the clutch plates. You will tighten the three screws that mount the clutch to the motor. Try and get as close to .010" as you can. After adjustment start the motor and try and engage the pto. I bet it will work.
Good luck
SOURCE: engine cutting off after engaging the pto (mower deck) JD 317
its likely to be a switch playing you up try hard wireing the switch to see if it stops this cutting out first, do one switch at a time till you fine the one playing up
SOURCE: My simplicity Coronet Hydro 13 lawn tractor loses
The fluid in the transmission is a multigrade oil. sometimes you can change the oil by removing the transmission partially or entirely and change the oil to a heavier grade like 15W40 or 20W50, the transmission has a vent mechanism on top that is where the oil would be extracted or drained from and then refilled, the level at full cold is 1" to 1 1/4" below the bottom edge of the inside of the vent pipe or plug boss. some of these had a flat vent plug, some have a hose with the vent in the end attached at a nipple and still some older units had a reservoir like on the larger tractors. The reason your trans is slowing is due to wear in the hydraulic pump face.
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