•
Incorrect setup and adjustments.
•
Fuel is being restricted to the engine.
a. Engine fuel filter is obstructed. Refer to
Maintenance
section.
b. Fuel tank filter obstructed.
c. Stuck antisiphon valve located on permanently built‑in type fuel tanks.
d. Fuel line is kinked or pinched.
•
Fuel pump failure.
•
Ignition system component failure.
Engine Overspeed (Excessive RPM)
POSSIBLE CAUSES
•
Outboard mounted too high on the transom.
•
Worn jet pump impeller or liner.
•
Incorrect jet pump impeller clearance adjustment.
•
Tilting the outboard out beyond a vertical position.
•
Cavitation of the impeller due to rough water or obstruction in the boat
hull.
•
Blockage of the water intake.
Performance Loss
POSSIBLE CAUSES
•
Throttle not fully open.
•
Damaged impeller.
•
Incorrect engine timing, adjustments, or setup.
•
Boat overloaded or load improperly distributed.
•
Excessive water in bilge.
•
Boat bottom is dirty or damaged.
Battery Will Not Hold Charge
POSSIBLE CAUSES
•
Battery connections are loose or corroded.
•
Low electrolyte level in battery.
•
Worn out or inefficient battery.
•
Excessive use of electrical accessories.
•
Defective rectifier, alternator, or voltage regulator.
TROUBLESHOOTING
eng
75
Содержание 25 Jet FourStroke
Страница 1: ...Operation Maintenance and Installation Manual 2018 Mercury Marine 25 Jet FourStroke 8M0145522 418 eng...
Страница 2: ...eng...
Страница 6: ...eng iv...
Страница 10: ...eng viii...