MAINTENANCE
TP-6901 3/16a Maintenance 33
Replace the Spark Plugs
Spark plugs should be replaced at the recommended
intervals specified at the beginning of this section. Use
only the recommended spark plug or an equivalent.
See “Specifications of Main Components” in Section 8.
Required materials:
• Replacement spark plugs (4). See Section 8.2 for
spark plug specifications.
• Spark plug wrench
• Spark plug gap tool
• Torque wrench
• Clean, dry cloth
Procedure:
1. Stop the engine and allow it to cool.
2. Use a cloth to wipe dirt and oil away from the area
around each of the four spark plug wires (A). See
Figure 5-12.
3. Disconnect the spark plug wires.
4. Wipe the interior of the spark plug tubes.
5. Use a spark plug wrench to remove the old spark
plugs.
Figure5-12
Figure5-13
6. Use a spark plug gap tool to measure the gap (B)
on each new spark plug. Adjust the gap to
specification. See Figure 5-13.
7. Install the new spark plugs in the cylinder head.
8. Tighten the spark plugs to specification.
Electrical shock can cause injury.
Do not touch wires while engine is
running.
Hot parts can cause severe burns.
Do not touch engine while operating
or just after stopping.
Never operate engine with heat shields or guards
removed.
Label or mark spark plug wires before
disconnecting. Spark plug wires MUST be
installed in proper order.
Spark Plug Gap
KG2204 0.9–1.0 mm (0.036–0.040 in.)
KG2204T 0.7–0.8 mm (0.028–0.031 in.)
Spark Plug Torque
KG2204 18 N•m (13.3 ft.lb.)
KG2204T 25 N•m (18.4 ft.lb.)