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Mercury 400R Verado FourStroke - Engine Performance Loss

Mercury 400R Verado FourStroke
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b. Fuel tank filter obstructed.
c. Stuck anti‑siphon valve located on permanently built‑in type fuel tanks.
d. Fuel line is kinked or pinched.
Fuel pump failure.
Ignition system component failure.
Performance Loss
POSSIBLE CAUSES
Overheating ‑ Warning horn not working.
Low oil pressure. Check oil level.
Throttle not opening fully.
Damaged propeller or improper propeller size.
Incorrect engine timing, adjustment, or setup.
Boat overloaded or load improperly distributed.
Excessive water in bilge.
Boat bottom is dirty or damaged.
Air filter or intake screen that is partially blocked with debris.
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.
Open circuit in the alternator output wire (fused link).
TROUBLESHOOTING
eng 121

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