You need to start at the simple stuff. Check the spark plugs and see if they are wet with gas. If not, could be a fuel pump issue. See if the plugs are fouled, change them and check for spark. If you have both, it should at least sputter. Check for water in the fuel.
SOURCE: Overheating YAMAHA XLT 1200 jet ski
you may have something clogged in a water passage but more than likley u have a bad sensor the sensor is located on the main exhuast if you go on the right side of the ski and look in the engine compartment it will be located at 9 oclock u will see it sticking out of the exhuast with one wire comming out after u run the ski and the buzzer goes off pull the seat and see if the engine is really hot if u can not touch it will be hot but it has to be very hot for the sensor to pick it up if u can touch the motor and exhuast it is a bad sensor
SOURCE: how do we start a yamaha 1998 xl 1200 wave runner
first put a new battery in it. then put your lanyard in the handle bar clip push the start button make sure that you have a life jacket on when your in the water and make sure that u attach the lanyard to your wrist or life jacket
SOURCE: I have an 06 XL 1200 that just started choking out
This could be a variety of issue's from over choking, to bad fuel. Make sure your not leaving the choke on to long, as this can foul the plugs. Bad fuel could cause this, as water or other contaminents get into the float bowl and don't affect the enrichment ports due to fuel bypassing the float bowl. This would lead to the bike running worse as the enrichment knob is pushed back in. Last but not lease, could also be an electrical related issue due to the bike warming up and causing a short or open as stuff expands. I would change your plugs, then drain the float bowl into a clear glass jar to examine contents. if fuel and spark seems ok, you will have to look at electrical. plug wires, crank shaft position sensor, coil. It may take someone with the tools to test these components in order to diagnose the issue. If you see that the tach (if you have one) or lights in your display's flicker, it could also be battery related. loose ground. Many possibilities.
SOURCE: Have a 1999 yamaha 1200 xl limited waverunner only
your starter is shot more than likey try to jump the relay in that black boxs buy jumping the two post on that round relay if it does the same its the starter if it turns over its the relay or the start **** becareful jumping the relay no fuel around air bike out and you have to take off the exhaust manifold to get to the starter
SOURCE: I need the start code for a 1999 yamaha 1200
Behind front storage container is a wiring harness, locate the single blue connector and disconnect, red light should be on dash now hold mode button down until it says SET. enter new code then reattach connector
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