I have Yamaha 115 that the warning alarm went off on last week. I have read the other post on this subject. It was a over heat alarm. The water pressure gauge was not registering at all, so I replaced the impeller. Took it to the lake today and the water gauge is working good now, and the pee stream is a lot stronger. Alarm did go off today though. it only went off when I tried to trim up the motor. Just as soon as you touch the trim button the alarm goes off. The battery was low when I put in and I jumped it off. Could the battery voltage cause the alarm to go off in this matter. Any help would be appreciated. Thanks