Power comes on but engine does not turn over or try to start?

So it does turn over or no it doesnt turnover.

The best try to find out the code, then start to do something. Get scanner can use ask a friend.

Make sure your rig is in neutral. Some types cut the plug power others cut all power. It does sound like a blown coil pack . If it was hard to start or ran rough when going this is an indicator but not always the case.

Turn over is the process that an engine makes when it is trying to start. If you twist the key and get nothing then it wont turn over. Google shimming a starter and watch the vids.

If you look at the picture - 29, 30 & 31 are the starter relay, main fuse and probably the bolt that holds it to the frame. When that fuse blows or that relay goes out - it's over. Not going to start. If you have a standard test light - attach the clip end to ground (frame of atv) and then put touch the postivie post of the battery to verify that the light is functional. It will light up if the battery is good. Next -follow the red cable to the starter relay in the diagram. Where it attaches - check for power. With the key off. IT should be live without the key in. It's on standby in a way. If you do not have power at the other end of your positive cable - your cable is shot. If you do - then you will have someone turn the key and check to see if power is coming from the other post off the relay (that would go to the starter and make it engage - if the square standard fuse in that relay is not blown - but power is not coming through when you touch the key - it's probably the relay. Your safety switch among other things can prevent the engine from starting as well - along with loose cables and grounds (always do a thorough check of all wire connections and grounds - one loose ground can mean a nightmare sometimes) - if you give that a try and do not identify the culprit - just comment or reach out and I'll take you through the next steps. All The Best, Justin Lee, 17 South Industries, LLC


Here's a copy with 29, 30 & 31 Link will take you to page as well*


2003 Yamaha GRIZZLY 660 YFM660FR Parts


Your starter relay -


4SV 81940 12 00

To try to disconnect the plug of the temperature sensoron the engine block and turn the start. If the fans topped working, then the problem is in the temperature sensor

If engine does not turn over you need to see if the starter is getting power and if it is any good. Also look for an inline safety switch for the starter that may be stuck in the open position and not allowing the electricity to enter the starter motor.

replace the battery as there is not enough charge to start and provide power for the ignition
when you pull start the max power is provided to the ignition system

I would follow lines coming out from the gas tank to see one that goes to carburetor . I would try to blow mild force air into that line and see,with tank cap off, bubbles come out from tank;then try starting it and if it runs a little longer then I imagine something is clogging the flow. Hope suggestion helps.