Mercury 300 - PRO MAX 3.0L - Troubleshooting; Starter Motor Will Not Crank; Engine Will Not Start

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TROUBLESHOOTING
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1 – STARTER MOTOR WILL NOT CRANK THE ENGINE
POSSIBLE CAUSES
• Blown 20 Amp fuse in the starting circuit. Refer to Maintenance
Section.
• Outboard is not shifted to neutral position.
• Weak battery or battery connections are loose or corroded.
• Ignition key switch failure.
• Wiring or electrical connection faulty.
• Starter motor or starter solenoid failure.
2 – ENGINE WILL NOT START
POSSIBLE CAUSES
• Lanyard stop switch not in RUN position.
• Incorrect starting procedure. Refer to Operating Section.
• Old or contaminated gasoline.
• Engine flooded. Refer to Operating Section.
• Fuel is not reaching the engine.
a. Fuel tank is empty.
b. Fuel tank vent not open or restricted.
c. Fuel line is disconnected or kinked.
d. Fuel filter is obstructed. Refer to Maintenance Section.
e. Fuel pump failure.
f. Fuel tank filter obstructed.
• Ignition system component failure.
• Spark plugs fouled or defective. Refer to Maintenance Section.