Yamaha F25A Service Manual (English)

Other manuals for Yamaha F25A

Questions and Answers:

Brian BernardAug 14, 2025

What to do if my Yamaha Outboard Motor engine will not start?

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Emily PenaAug 14, 2025
If your Yamaha Outboard Motor engine won't start but the starter is operating, several factors could be at play. First, ensure the fuel tank isn't empty and that you're using clean, fresh fuel. A clogged fuel filter could also be the culprit, so try cleaning or replacing it. Make sure you are following the correct starting procedure. Other potential issues include fouled or incorrect spark plugs (inspect, clean, or replace them), incorrectly fitted spark plug caps (check and refit), poor ignition wiring connections (check for wear, tighten, or replace wires), a missing engine stop switch lanyard (attach it), or damaged internal engine parts or fuel pump malfunctions, which would require servicing by a Yamaha dealer.

Brenda YoungAug 17, 2025

Why is the warning buzzer sounding on my Yamaha F25A Outboard Motor?

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Norman SmithAug 18, 2025
If the warning buzzer sounds or the indicator lamp lights on your Yamaha Outboard Motor, it could be due to several reasons. Check the water intake for any restrictions, as the cooling system might be clogged. Ensure the engine oil level is adequate and that you're using the specified engine oil. Also, the spark plug's heat range might be incorrect, so inspect and replace it if necessary. Other potential causes include contaminated or deteriorated engine oil (replace it), a clogged oil filter, or improperly distributed load on the boat (distribute the load evenly). For issues like a faulty water pump/thermostat or oil feed/injection pump malfunctions, it's best to have it serviced by a Yamaha dealer.