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Service Engine - 33
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.
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 lb-ft).
11.Connect spark plug wire and lower hood.
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
NOTE: Change filter when fuel is low.
1. Park machine safely. (See Parking Safely in the
SAFETY section.)
2. Let engine cool.
3. Lift hood.
4. Put a drain pan under fuel filter.
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.
B
c CAUTION: 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 well-ventilated area.
• Clean up spilled fuel immediately.
c CAUTION: 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.
A
B