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2017 Hisun 500 vector utv starting issues


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Wife said UTV stopped running and cannot restart. I checked the battery, it was good. I checked the fuse box, no blown fuses. Whe I tried to start, the starter had a thump noise one time, and the starter relay wires were hot. I replaced the relay, nothing. I then replaced the starter and still the same symptoms. It won't start and relay wires hot.  Any ideas what to check next- perhaps ground strap of which I have no idea where it would be, or perhaps a new fuse box with new relays?

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Based on those symptoms I would remove and bench test the starter next. It sounds like there may be an internal short.

Remove it and clamp it to the workbench. Connect a battery with jumper cables to the ground, and tap the terminal briefly with the positive cable and see if it spins like it should. My guess would be it doesn't. 

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From the text you wrote, it seems that it stopped running while your wife was operating it. At that point, she tried to re-start it without success. Does it turn over? If it does, look to the ignition, if not; does the starter get voltage while trying it? If it does and the engine won't turn over the engine might be siezed. If it doesn't look to the relay. Is there voltage going to the relay but not going through during start up, then it's a relay. Your volt meter is always your best friend. 

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On 8/1/2022 at 10:14 PM, Michael R said:

Wife said UTV stopped running and cannot restart. I checked the battery, it was good. I checked the fuse box, no blown fuses. Whe I tried to start, the starter had a thump noise one time, and the starter relay wires were hot. I replaced the relay, nothing. I then replaced the starter and still the same symptoms. It won't start and relay wires hot.  Any ideas what to check next- perhaps ground strap of which I have no idea where it would be, or perhaps a new fuse box with new relays?

If it were my machine, (MSU 800) I'd take the screw cap off the end of the magneto, using the correct size Allen wrench make sure the engine isn't stuck, "froze". Can't say for sure on that 500 if that's how to check it. I'm sure there are some here that can tell you. Aefron88 for one.

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