Hyundai HY25-2, User Manual

Page: 15 / 20

Page 15
The use of any spark plug other than the one designated may result
in the engine failing to run correctly becoming overheated and
damaged.
6.4. Fuel filter.
A clogged fuel filter can cause lack of power and poor pickup.
6.4.1. Remove the fuel cap (1) and empty the
remaining fuel into an approved container.
6.4.2. With a small wire hook, pull the fuel line and filter
(2) out of tank.
6.4.3. Disconnect the filter assembly.
6.4.4. If necessary, replace with new filter or clean by
blowing air inside out.
7. TROUBLESHOOTING
STARTING FAILURE
CHECK POSSIBLE CAUSE CORRECTIVE ACTION
Fuel tank Incorrect fuel
Drain tank and fill with correct
fuel
Fuel filter Fuel filter element is clogged Clean and/or replace
Carburetor adjustment Out of normal range Adjust
No spark
Spark plug is wet or fouled Dry and clean
Incorrect gap
Adjust to correct gap 0.6mm to
0.7mm
Spark plug Disconnected Connect
ENGINE STARTS BUT KEEPS STOPPING – HARD TO RE-START
CHECK POSSIBLE CAUSE CORRECTIVE ACTION
Fuel tank Incorrect or stale fuel
Drain tank and fill with correct
fuel
Carburetor adjustment Out of normal range Adjust
Exhaust port Excessive carbon build up Clean
Air Filter Blocked with dust Wash and/or replace
Cylinder fins/Fan cover Blocked with dust Clean
PUMP
CHECK POSSIBLE CAUSE CORRECTIVE ACTION
Pump does not turn
Engine does not start Refer to engine manual
Impeller stuck/stiff Dis-assemble and clean
Pumping volume low
Air gap at suction side Check for air leaks
Failed mechanical seal Replace seal
High suction lift Lower lift height
Pump not drawing in water
Not primed Prime
Air allowed to enter mechanical
seal
Replace seal
Suction of air at suction side Check all seals at suction side
Drain plug loose Tighten/check seal
Ver 2