Mercury Bravo Sterndrive 520 - User Manual

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520 Bravo Sterndrive Models

8M0098857 115 eng

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Questions and Answers

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Brooke Nichols DDSAug 7, 2025
What to do if my Mercury Boating Equipment engine will not crank?
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  poolechristopherAug 7, 2025
  If your Mercury Boating Equipment engine won't crank, start by checking if the battery switch is turned "ON." Ensure the gearshift is in the neutral position. Inspect the circuit breaker or fuse and reset or replace if necessary. Examine all electrical connections and wires, paying special attention to the battery cables; clean and tighten any faulty connections. Test the battery and starter, replacing them if defective. Confirm if the flywheel ring gear is damaged and replace the flywheel if needed. Check if the engine can be rotated by hand with the spark plugs removed; if not, determine the cause. Finally, test the ignition switch.
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Wendy MillerAug 22, 2025
What to do if Mercury Boating Equipment engine cranks but will not start?
- C
  cannontannerAug 22, 2025
  If your Mercury Boating Equipment engine cranks but doesn't start, make sure you're following the correct starting procedure. Check the battery voltage and charge it if it's low. Ensure the fuel tank isn't empty and the fuel shut-off valve is open. If these steps don't resolve the issue, look for a faulty fuel pump, wiring, fuel pump fuse, the 50-amp circuit breaker, or the fuel pump relay, and replace any faulty components. Also, service the ignition system and reset the lanyard stop if it's activated. Replace obstructed fuel filters. If the fuel is stale or contaminated, drain the tank and fill it with fresh fuel.