Mercury Racing HP565 - User Manual

Questions and Answers

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Lindsey DavisAug 4, 2025
What to do if my Mercury Racing Engine cranks but will not start?
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  vgomezAug 4, 2025
  If your Mercury Racing Engine cranks but doesn't start, consider these possibilities: * You may be using an improper starting procedure. Review the correct starting procedure. * Low battery voltage can prevent starting. Charge the battery. * The fuel tank might be empty, or the fuel shut-off valve could be closed. Fill the tank or open the valve. * A faulty fuel pump, wiring, fuel pump fuse, 50 amp circuit breaker, or fuel pump relay could be the issue. Replace the faulty component. * A component of the ignition system may be faulty. Service the ignition system. * The lanyard stop may be activated. Reset it. * The fuel filter might be obstructed. Replace the filters. * The fuel could be stale or contaminated. If contaminated, drain the tank and fill it with fresh fuel.
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James CurtisAug 11, 2025
Why is my Mercury Racing Engine hard to start and running rough?
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  Suzanne BurnsAug 11, 2025
  There are several reasons why your Mercury Racing Engine might be hard to start, run rough, miss, or backfire: * A faulty ignition system component could be the cause. Service the ignition system. * The fuel filter might be clogged. Replace the filters. * The fuel could be stale or contaminated. If contaminated, drain the tank and fill it with fresh fuel. * A kinked or clogged fuel line or fuel tank vent line could be restricting fuel flow. Replace kinked lines or blow out lines with compressed air to remove the obstruction. * The flame arrestor might be plugged. Clean or replace the flame arrestor. * The rev limiter may be engaging at wide-open throttle. Change to a propeller with more pitch.
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Erica HaleAug 27, 2025
How to fix low coolant temperature on Mercury Racing Engine?
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  Steven GallegosAug 27, 2025
  If you are experiencing low engine coolant temperature in your Mercury Racing Engine, the thermostat may be faulty. Replace it.
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Amy TurnerNov 18, 2025
What to do if my Mercury Racing HP565 will not crank?
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  richardsmithNov 19, 2025
  If your Mercury Racing Engine won't crank, there are several potential causes: * The battery switch might be turned "OFF." Ensure it is turned "ON." * The gearshift may not be in neutral. Position the control lever to neutral. * There might be an open circuit breaker or blown fuse. Check and reset the circuit breaker or replace the fuse. * Loose or dirty electrical connections or damaged wiring can be the culprit. Inspect all electrical connections and wires (especially battery cables), cleaning and tightening any faulty connections. * The battery could be defective. Test and replace it if necessary. * The starter might be defective. Test and replace if needed. * The flywheel ring gear could be damaged. Confirm the diagnosis and replace the flywheel. * The engine could be ...