Spark Plug, Crankcase Ventilation, Fuel Line and Exhaust

SPARK PLUG 

1. Remove spark plugs

2.  Inspect:

• Electrode (1) for wear/damage.
• Insulator color (2)

3.  Measure the plug gap (3) using a Wire Gauge or Feeler Gauge. Regap as reqired.

Plug Gap: 0.6 - 0.7 mm (0.024 - 0.028 in)

Clean the plug with a spark plug cleaner if necessary.

Standard Spark Plug: DR8ES-L (NGK) X24ESR-U (NIPPONDENSO)

Before installing a spark plug, clean the gasket surface and plug surface. 

4. Tighten Spark plug(s) to 17.5 Nm (1.75 m-kg, 12.5 ft-lb)

NOTE:
Finger-tighten the spark plug(s) before torquing to specification.

CRANKCASE VENTILATION SYSTEM

1. Inspect the crankcase ventilation hose (1).  Replace damaged hoses.

FUEL LINE

1. Inspect:

• Fuel hose (1)
• Vacuum hose (2)

 Replace damaged hoses.

INTAKE MANIFOLD

1.  Tighten:
• Carburetor clamps
• Carburetor joint bolts

2.  Inspect:

• Carburetor joint
• Gaskets 

  Replace if necessary.

EXHAUST SYSTEM

1.  Inspect:
•Exhaust pipe gasket(s) (1)
• Muffler clamp gasket(s) (2)

Damage > Replace.
Exhaust gas leakage > Repair.

2.  Tighten:
• Exhaust pipe bolts
• Muffler bolts

Exhaust Pipe Flange (3) :10 Nm(1.0m-kg, 7.2ft-b) 
Exhaust Pipe Clamp (4) :20 Nm (2.0 m-kg, 14 ft-lb) 
Exhaust Chamber Mount (5): 25 Nm (2.5 m-kg, 18 ft-lb) 
Muffler Clamp (6): 20 Nm (2.0 m-kg, 14 ft-lb) 
Muffler Bracket (7) 20 Nm (2.0 m-kg, 14 ft-lb)