2015 Yamaha 250 Four Stroke

by Tim
(Twin Falls, Idaho)

This motor has run like a top for the last four years.The motor runs great on 80% throttle however I took it up to 100% throttle and the motor completely shut off. I fired the motor right back up and ran fine as long as I keep at 80% throttle. This is the first time this has done it on this boat. I recently changed the oil filter and the lower unit oil and a fuel water separator. The boat motor pisses fine. Are there top end jets on these motors that could be clogged from bad fuel?

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Aug 01, 2022
Same problem NEW
by: AnonymousBob

I have a 2014 250 4 stroke. Been running great. Yesterday it completly shut down at 3600 rpms. started right up and ran fine rest of the day. Later in day same thing happened. shut down at 3700 rpm's. started right back up. Not sure what to check. Some are saying change CAM Sensor. Any thoughts on this?

Nov 24, 2021
by: Anonymous

I don’t see any responses to any of these posts ? Am I missing something

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