Spark Plug - Club Car Gasoline Service Manual

Lubrication System, Continued:
13
The pump draws oil from the sump and forces it under pressure into the crankcase passages as shown (Fig-
ures 13-2 and 13-3, Page 13-5). Oil can build up excess pressure in the lubrication system. Excess oil pres-
G
sure could force the oil past seals and cause engine damage. Because this pressure must be relieved, the
pump is fitted with the pressure relief valve (8) (Figure 13-2) that is made of a ball and a spring. When the
pressure increases beyond the pressure of the spring, the ball is forced off its seat against the spring pres-
sure and excess oil is routed back into the sump (crankcase), thus relieving the pressure. When the pressure
drops below the preset limit, the spring holds the ball against its seat to keep the oil from draining back into
the sump (crankcase).

SPARK PLUG

Spark plugs are selected to suit specific engine design and vehicle operating conditions. The spark plug is
designed to give maximum life and efficient combustion of fuel. Original equipment plug number is Club Car
Part Number 1018811-01. An acceptable replacement is a Champion N11YC. The spark gap is .027-.031
inches (0.69-0.79 millimeter).
Removing the Spark Plug
WARNING
• WHEN MAKING TESTS OR REPAIRS, ALWAYS:
- WEAR SAFETY GLASSES OR APPROVED EYE PROTECTION.
- REMOVE KEY.
- DO NOT ATTEMPT TO SERVICE HOT ENGINE OR EXHAUST.
- DISCONNECT BATTERY AS SHOWN (FIGURE 12-1, PAGE 12-2).
- REMOVE SPARK PLUG WIRE.
• BEFORE REMOVAL AND DISASSEMBLY, CLEAN THE ENGINE.
• SEE SAFETY WARNINGS, PAGE 13-1.
Remove all dirt from plug base in head before removing plug. Use a 13/16 inch deep well socket wrench or
13/16 inch plug wrench to loosen the plug.
Spark Plug Cleaning, Inspection and Repair
Examine the plug (Figure 13-4). The deposit on the plug base and electrode is an indication of the correct
heat range and efficiency as well as a guide to the general condition of the engine, fuel and air mixture and
ignition system. If all of the above conditions are proper, the spark plug should be a light brown color. There
should be no bridging between the electrode and base. The electrode should not be eroded. Black color,
excessive carbon, and/or a wet plug indicate a too rich condition. White, burned or melted electrodes indicate
a too lean condition or pre-ignition. Also examine the spark plug wire. Remove rubber boot and inspect inter-
nal spring for damage. Inspect spark plug wire for damage and be sure spring coil is securely attached to
spark plug.
WARNING
• REMOVE SPARK PLUG WIRE TO AVOID ACCIDENTAL START UP OF THE ENGINE WHEN SER-
VICING VEHICLE. TO AVOID IGNITION OF FUEL AND SEROUS PERSONAL INJURY, NEVER
TRY TO START ENGINE WITH PLUG CONNECTED TO SPARK PLUG WIRE AND PLUG
REMOVED FROM ENGINE.
Page 13-6