Onan NHC Series - Page 8

STARTING SYSTEM
s
Loose or Corroded Battery Connection
a
•
Low or Discharged Battery
•
Faulty Starter
•
Faulty Start Solenoid
IGNITION SYSTEM
• • • •
e
Ignition Timing Wrong
o
• •
Wrong Spark Plug Gap
e
• •
Worn Points or Improper Gap Setting
• • •
Bad Ignition Coil or Condenser
• •
Faulty Spark Plug Wires
•
e
j
Out of Fuel - Check
• • •
s
• •
Lean Fuel Mixture - Readjust
t
e
•
a
e
Rich Fuel Mixture or Choke Stuck
•
c
•
9
Engine Flooded
e
• • • • •
Poor Qual ity Fuel
• •
0
• •
Dirty Carburetor
• • • • • •
a
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Dirty Air Cleaner
• • •
Dirty Fuel Filter
• • • •
Defective Fuel Pump
INTERNAL ENGINE
• • • • •
Wrong Valve Clearance
• •
a
• •
Broken Valve Spring '
a
• • • •
Valve or Valve Seal Leaking
* • •
e
Piston Rings Worn or Broken
•
a
• • •
Wrong Bearing Clearance
COOLING SYSTEM (AIR COOLED)
• •
Poor Air Circulation
• •
Dirty or Oily Cooling Fins
•
•
• •
Blown Head Gasket
- COOLING'SYSTEM (WATER COOLED)
•
Insufficient Coolant
ft
•
Faulty Thermostat
• •
Worn Water Pump or Pump Seal
•
Water Passages Restricted
•
Defective Gaskets
• • • • • •
Blown Head Gasket
, - LUBRICATION SYSTEM
• •
Defective Oil Gauge
• •
Relief Valve Stuck
• • • • •
a
•
Faulty Oil Pump
e
• •
a
• •
Dirty Oil or Fi Iter
• • • • • • • •
a
•
Oil Too Light or Diluted
o
• • • •
a a
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Oi 1 Level Low
• •
Oil Too Heavy
• • • •
Dirty Crankcase Breather Valve
THROTTLE AND GOVERNOR
• •
Linkage Out of Adjustment
•
Linkage Worn or Disconnected
•
Governor Spring Sensitivity Too Great
•
Linkage Binding