YAMAMAN1964
New member
Hi Guys, I have had dozens and dozens of Yamaha's, 2 strokes, 4 strokes, name it. This sled has me completely stumped.
My son picked up a 1989 VK540 to use ice fishing. Nice clean sled, started right up, drove it around, no problems.
Brought it fishing the first day, sled started, ran out on the lake about 300 yards and shut down. Let it sit 5 minutes, started right back up and run for a bit, cut out again. brought it home, got it to do it right in the garage. Checked stator, all resistance checks OK, checked grounds, wiring, kill switch, ignition switch...concluded it must be the CDI box cutting out. Replaced it, same thing. Again checked grounds, wiring, switches, etc. again. At this point, regardless of the stator ohms readings, I replaced it (All parts were from Yamaha, no aftermarket junk). Sled started right up, ran in the garage 15-20 minutes, took it outside, ran around the field another 15-20 minutes. Ran excellent no issues. It was shutting down before in 5 minutes. We figured we had it.
Brought it back to the lake the next day, sled ran 300-400 yards after running for a while warming up, and then shut down. This time for good. Did not start after sitting. Brought back to garage, again checked all switches, stator resistance, grounds, and even ran extra grounds to the frame to be sure. This is where I sit, stumped. If I knew what the signal to the CDI box was supposed to be from the stator that may help. I even tried plugging the original CDI box back in. Still no spark. Any help or suggestions will be greatly appreciated. THINK SNOW, THINK YAMAHA...
My son picked up a 1989 VK540 to use ice fishing. Nice clean sled, started right up, drove it around, no problems.
Brought it fishing the first day, sled started, ran out on the lake about 300 yards and shut down. Let it sit 5 minutes, started right back up and run for a bit, cut out again. brought it home, got it to do it right in the garage. Checked stator, all resistance checks OK, checked grounds, wiring, kill switch, ignition switch...concluded it must be the CDI box cutting out. Replaced it, same thing. Again checked grounds, wiring, switches, etc. again. At this point, regardless of the stator ohms readings, I replaced it (All parts were from Yamaha, no aftermarket junk). Sled started right up, ran in the garage 15-20 minutes, took it outside, ran around the field another 15-20 minutes. Ran excellent no issues. It was shutting down before in 5 minutes. We figured we had it.
Brought it back to the lake the next day, sled ran 300-400 yards after running for a while warming up, and then shut down. This time for good. Did not start after sitting. Brought back to garage, again checked all switches, stator resistance, grounds, and even ran extra grounds to the frame to be sure. This is where I sit, stumped. If I knew what the signal to the CDI box was supposed to be from the stator that may help. I even tried plugging the original CDI box back in. Still no spark. Any help or suggestions will be greatly appreciated. THINK SNOW, THINK YAMAHA...