[Adam loggins]

I have a 2004 Yamaha kodiak 450, went to go crank it and it starts up perfectly fine the first time completely cold. Then after it warms up a little it dies and won’t start back up again.
Has new gas in it and new spark plug. Wondering if y’all had any ideas on what it could be?

 

[Maddevill]

Check for spark when it's hot. You could have a coil failing



Mad

 

[Adam loggins]

Check for spark when it's hot. You could have a coil failing



Mad

Would that be the ignition coil ?

 

[Maddevill]

Yes. If a coil is starting to go bad, it will usually fail when the electrical windings get hot

Mad

 

[Adam loggins]

Yes. If a coil is starting to go bad, it will usually fail when the electrical windings get hot

Mad

Ok. Just to be clear when it dies. It still turns over and tries to crank. When the coil is bad will it still turn over or will it not try to crank at all?

 

[Maddevill]

Yes. That's why I said to check for spark when the motor dies when it's hot. A failed coil doesn't affect the starting system at all. You can crank the motor all you want but if the coil failed when it gets hot, you'll have no spark.
It's easy to check and can eliminate at least one possible cause. Start by checking if you have spark when the motor is cold. ( You should since it starts) Then check again immediately after it stops running.
If no spark when hot, replace the coil. If it still has spark then there's something else going on. But remember, if you have fuel and air, compression and spark, in the correct order, the motor WILL run.
To check for spark, remove the spark plug and reconnect it to the spark plug wire. Hold the electrode to the cylinder head. Crank the motor and look for a blue/white spark

Mad