SERVICE ENGINE
6.Clean spark plug carefully with a wire brush.
7.Inspect spark plug for:
•Cracked porcelain.
•Pitted or damaged electrodes.
•Other wear or damage.
8.Replace spark plug as necessary.
B
M85200
9.Check plug gap (B) with a wire feeler gauge. To change gap, move the outer electrode.
•Gap must be 1 mm (0.040 in.).
10.Install and tighten spark plug to 20 N•m (15
Adjusting Carburetor
NOTE: Carburetor is calibrated by the engine manufacturer and is not adjustable.
If engine is operated at altitudes above 1829 m (6,000 ft), some carburetors may require a special high altitude main jet. See your authorized dealer.
If engine is hard to start or runs rough, check the troubleshooting section of this manual.
Possible engine surging will occur at high throttle with transmission in “N” neutral and mower engagement lever disengaged. This is a normal condition due to the emission control system.
After performing the checks in the troubleshooting section and your engine is still not performing correctly, contact your authorized dealer.
Replacing Fuel Filter
cCAUTION: Avoid injury! Fuel vapors are explosive and flammable:
•Do not smoke while handling fuel.
•Keep fuel away from flames or sparks.
•Shut off engine before servicing.
•Cool engine before servicing.
•Work in a
•Clean up spilled fuel immediately.
NOTE: Change filter when fuel is low.
1.Park machine safely. (See Parking Safely in the SAFETY section.)
cCAUTION: Avoid injury! Touching hot surfaces can burn skin. The engine and components will be hot if the engine has been running. Allow the engine to cool before servicing.
2.Let engine cool.
3.Lift hood.
4.Put a drain pan under fuel filter.
B
A
MX13768
5.Slide hose clamps (A) away from fuel filter (B) using a pliers.
6.Disconnect hoses from filter.
7.Connect hoses to new filter making sure the filter arrow is pointed in the direction of the fuel flow.
8.Install clamps and check for leaks.
9.Lower hood.
Service Engine - 33
