Performance Loss At Normal Rpm; Performance Loss At Wide-Open Throttle; Battery Will Not Hold Charge - Mercury 200 Sport-Jet Operation & Maintenance Manual

• Threaded connection of an air hose is loose.
• Fuel pump failed.
• Ignition system component failed.

Performance Loss at Normal RPM

POSSIBLE CAUSES
• Boat overloaded or load improperly distributed.
• Excessive water in bilge.
• Boat bottom is dirty or damaged.
Performance Loss at Wide‑Open Throttle
POSSIBLE CAUSES OF LOW RPM (USUALLY ENGINE RELATED)
• Throttle is not fully open.
• Exhaust system is blocked.
• Ignition system has a problem.
• Spark plug is fouled or an injector failed.
• Air compressor inlet is blocked.
POSSIBLE CAUSES OF HIGH RPM (USUALLY PUMP RELATED)
• Impeller is damaged.
• Impeller or wear ring is worn.
• Impeller, inlet, or stator is fouled.
• Ride plate seal has a leak.

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.
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