Toro Lawnmower 20099 Mower Mowers Lawn - Page 9 - Answered Questions & Fixed issues

Hopefully it is off by now. If the kill switch does not work then take off the air filter and put your hand over the opening or pull the plug wire or put the choke on full.

Kohler EFI trouble chart. Suggest you replace spark plugs and air filter if you haven't recently. Check for water in fuel. There is another fuel filter in the EFI system but not likely your problem.

Is there grass/dirt etc.caught in the blades?

I would say that the cable has been overtightened and causing the engine to race when it should be idling. Recheck the fitting and the tension of the cable. At idle, it should be barely moving the carby throttle.

Given your description the brake actuator module is suspect. This unit has an automatic electric brake system. If the brake actuator does not fully rotate into brake set position the engine will not crank. Check for obstructions in brake linkage. You could try disconnecting brake linkage and see if it allows for engine start. Can also be a bad pole in the PTO switch or loose connection somewhere in start engine safety interlock.

Make sure that the drive belt is tight when engaged and not slipping.

I have found that although they may look similar, with out changing brackets and adding new pulleys they will not interchange. Also decks from the same manufacturer will be different in different years.

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You should be ok to clean the carburetor out clean the gas tank out and put new spark plugs or clean the plugs real good and it should crank be sure to run clean gas through line to fuel pump to be sure of gas circulation

Maybe valve hanging.

Have the battery load tested (any auto parts can do this for free) and make the engine spins freely.

it could be a few things but i would start by checking the wire connections at the switch to be sure they are secure and not corroded or broken. also the switch itself may be bad. check to see and replace .

Does not crank the engine? Cycle starter safety interlocks...

• Parking brake OFF then ON
• Both steering arms IN, then OUT
• PTO switch ON then OFF

Try to start. Engine cranks but wont fire?

• Check the fuel level in the tank is higher than the top of engine.

If still won't start, comment here so I may assist further if need be.

The B&S Vangaurd engine requires periodic valve lash adjustment (100 hrs by schedule). Overdue valve lash adjustment typically manifests with starter stall (starter engages, rotates engine, hesitates or stalls, and then spins/starts).

since toro has about 100 different models, could you be a little more vague.

what about them?

could be anything from the belt to the friction wheel to a simple adjustment. you have to take it apart to see

The safety interlock system is designed to prevent the engine from starting unless: • The PTO is disengaged. • The motion control levers are in the brake position You have to check both arm switches and PTO switch. AND somewhere/how there's a automatic park brake switch but I'm not locating in assembly drawing. If I've got the right model, you should hear the automatic brake deactivate when you pull both arms in and then set brake (default) when levers pushed out. Make sure nothing is interfering with auto-bake. Once all the interlocks are satisfied, rotating off/run/start switch to start will energize starter solenoid. Operator and service manuals available free from Toro. https://www.toro.com/en/parts/partdetails/?id=27013

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