Yamaha 150 4-stroke. The dealer ship installed starting motor battery and connected cables to wrong posts. I corrected the problem but blew many fuses. Replaced blown fuses. The motor will start and run fine then shuts down on its own. Trim won't work for a while then after sitting for a while everything works again. I brought it in and they said it was a ground issue and that it was fixed. It still happened then was a day before it worked again. I brought it back and they replaced the whole wiring harnesses and the ignition switch. Went to use it today and nothing worked. When you turn the key or hit the trim and tilt button the fuel gauge jumps and also the rpm gauge.
Help please! What could be the issue?
Help please! What could be the issue?