Eh42Pl/Eh50Pl Cooling System Troubleshooting; Overheating; Temperature Too Low; Leak At Water Pump Weep Hole - Polaris Trail Blazer Service Manual

ENGINE
4 Stroke Troubleshooting

EH42PL/EH50PL Cooling System Troubleshooting

Overheating

Low coolant level
S
Air in cooling system
S
Wrong type of coolant
S
Faulty pressure cap or system leaks
S
Restricted system (mud or debris in radiator fins or restriction to air flow, passages blocked in
S
radiator, lines, pump, or water jacket)
Lean mixture (restricted jets, vents, fuel pump or fuel valve)
S
Fuel pump output weak
S
Restricted radiator (internally or cooling fins)
S
Water pump failure
S
Cooling system restriction
S
Cooling fan inoperative or turning too slowly (perform current draw test)
S
Ignition timing misadjusted
S
Low oil level
S
Spark plug incorrect heat range
S
Faulty hot light circuit
S
Thermostat stuck closed or not opening completely
S

Temperature Too Low

Thermostat stuck open
S

Leak at Water Pump Weep Hole

Faulty water pump mechanical seal (coolant leak)
S
Faulty pump shaft oil seal (oil leak)
S
4/99 3.118 Polaris Sales Inc.