MAINTENANCE
Ignition System
The engine is equipped with an electronic ignition system. Only the spark plugs require maintenance.
For recommended spark plugs, see Technical Data.
1.Remove the ignition cable shoe and clean around the spark plug.
2.Remove the spark plug with a 13/16"
(21 mm) spark plug socket wrench.
3.Check the spark plug. Replace the spark plug if the electrodes are burned or if the insulation is cracked or damaged. Clean the spark plug with a steel brush if it is to be reused.
IMPORTANT INFORMATION
Fitting the wrong spark plug type can damage the engine.
Inadequately tightened spark plugs can cause overheating and damage the engine. Tightening the spark plugs too hard can damage the threads in the cylinder head.
4.Measure the electrode gap with a gapping tool. The gap shall be 0.75 mm. Adjust as necessary by bending the side electrode.
5.Reinsert the spark plug, turning by hand to avoid damaging the threads.
6.After the spark plug is seated, tighten it using a spark plug wrench so that the washer is compressed. A used spark plug should be turned
7.Replace the ignition cable shoe.
Checking the Safety System
The machine is equipped with a safety system that prevents starting or driving under the following conditions.
The engine can only be started when:
1.The mower deck is disengaged.
2.The steering controls are in the outer, locked neutral position.
3.The driver is sitting in the driver’s seat.
4.The parking brake is on.
Make daily inspections to ensure that the safety system works by attempting to start the engine when one of the conditions is not met. Change the conditions and try again.
If the machine starts when one of these conditions is not met, turn the machine off and repair the safety system before using the machine again.
Check that the engine stops if one, after having released the parking brake, temporarily stands from the driver’s seat (whether the mower deck is engaged or not).
Conditions for starting
IMPORTANT INFORMATION
In order to be able to drive, the driver must sit in the seat and release the parking brake before the steering controls can be moved into the neutral position, otherwise the engine will stop.
Check that the engine stops if the mower deck is engaged and one temporarily stands up.