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Mercury 90 Operation Maintenance Warranty Installation Manual

Mercury 90
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d. Fuel line is kinked or pinched.
e. Injector plugged.
Threaded connection of an air hose is loose.
Fuel pump failure.
Ignition system component failure.
Performance Loss
POSSIBLE CAUSES
Throttle not fully open.
Damaged propeller or improper propeller size.
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.
Open circuit in the alternator output wire (fused link).
Jet Application Troubleshooting
PERFORMANCE LOSS
Possible causes
Throttle not fully open.
Damaged impeller.
Boat overloaded or load improperly distributed.
Excessive water in bilge.
Boat bottom is dirty or damaged.
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.
TROUBLESHOOTING
112 eng

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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