Yammy F15 Intermittent Problem

I had the same thing happen to my 175 Merc. Ended up being a faulty primer bulb in the fuel line.

Sounds like an electrical issues. I would check all electrical connections to and from the motor. Could also be a faulty tether switch. Does the 15 have an engine control unit? If so that’s were I would start looking at connections. Hope this helps electrical issues can be difficult to figure out.

Good luck, Jeff

If you have the plugs, put them in and eliminate one possibility.
You put in sea foam, but is the gas fresh?
Have you cleaned or changed any fuel filters?

Superdo. Did your motor die instantly like someone turned a switch, or did it sputter a bit before dieing? Mine goes out fast.

The latest in my troubleshooting efforts on the intermittent problem.
Replaced both spark plugs during the week, and checked all the harness electrical connections to make sure they were snug. had the boat out yesterday, and same thing. Jiggled the kill switch button and tether to try to make it die, and would keep running. Also, tried pumping the fuel ball the second I heard it start to die, and no help.
I do have a spare Yamaha bulb from troubleshooting my other Yammy two years agao(that turned out to be a fuel pump), so going to swap them out just to make sure it’s not the bulb.
After that….probably going to have to wait it out, till s whatever it is goes all the way.