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Hello everyone,
I’m hoping someone with extensive experience on the Yamaha F250 can help me.
I have a 2010 Yamaha F250 (3.3L V6) installed as the port engine on a twin-engine boat.
The starboard engine is absolutely identical and runs perfectly under the exact same conditions. Symptoms
The engine starts instantly and runs perfectly.
After approximately 10-15 minutes at around 3800 RPM under load, it gradually starts losing RPM as if it is running out of fuel.
It does not stop suddenly like an ignition failure.
Instead, it slowly loses power until it stalls.
The heavier the boat load (more passengers), the sooner the problem appears.
If I reduce throttle before it stalls, it will often continue losing RPM and sometimes stalls when reaching idle (around 800-1000 RPM).
To restart it, I have to switch the ignition OFF, then back ON, wait a few seconds for the fuel system to prime, and then crank the engine.
Sometimes it stalls again shortly after restarting, but repeating the same procedure usually allows it to run normally again until the problem repeats.
There are no alarms, no overheat indication and no fault codes.
I’m hoping someone with extensive experience on the Yamaha F250 can help me.
I have a 2010 Yamaha F250 (3.3L V6) installed as the port engine on a twin-engine boat.
The starboard engine is absolutely identical and runs perfectly under the exact same conditions. Symptoms
The engine starts instantly and runs perfectly.
After approximately 10-15 minutes at around 3800 RPM under load, it gradually starts losing RPM as if it is running out of fuel.
It does not stop suddenly like an ignition failure.
Instead, it slowly loses power until it stalls.
The heavier the boat load (more passengers), the sooner the problem appears.
If I reduce throttle before it stalls, it will often continue losing RPM and sometimes stalls when reaching idle (around 800-1000 RPM).
To restart it, I have to switch the ignition OFF, then back ON, wait a few seconds for the fuel system to prime, and then crank the engine.
Sometimes it stalls again shortly after restarting, but repeating the same procedure usually allows it to run normally again until the problem repeats.
There are no alarms, no overheat indication and no fault codes.