I have a Yamaha F150, manufactured in 06. I purchased used a year ago with 20 hours on the engine. It has run flawless. It had all filters serviced when I bought it. I keep stabilizer in the fuel routinely, etc. I have run it every month over the winter for 2-3 hours to keep it exercised. This weekend I took it out and several times it "missed" when under moderate load or when running at 3500 rpm. I thought it was fuel and maybe time for new filters. However it started shutting down after it stalled. When shut down the motor wont crank, and I have no power to the trim unit including the trim button on the side of the motor. I have check and secured all battery connections (using lock nuts not wing nuts), and tried a new battery (that I load tested to make sure it was good). It shut down three times but eventually trim starts working and motor will crank and start fine. I realize I still may have fuel problem, but I want to start with why I am loosing power to the trim unit? I have checked and jiggled the trim fuses on the port side of the engine. Does/could the starter relay cause a loss of power to trim unit? Does the ECM/engine brain shut down all power when it senses an issue. When I have this problem, my voltage guage on the dash does not measure any power, but my depthfinder unit tells me its seeing 12.4. My fuel and Trim guages also have power, but in this condition the fuel reads 5/8s instead of the 3/8s that I know it has?
I'm new to the forum, thanks in advance for any help. I had to leave the boat at the lake, so I will have to go back to get the serial number.
I'm new to the forum, thanks in advance for any help. I had to leave the boat at the lake, so I will have to go back to get the serial number.