Ask the Editors: Quadrunner 250 No Vroom Vroom
When the magic button isn’t so magic.
It sounds to us like either a faulty starter motor or relay. Pushing the start button opens a power feed to the starter relay, which, in turn, provides battery voltage directly to the starter. A failure in any one of these components will cause the machine not to fire but how do you determine which is to blame?
A failed relay will not allow voltage to reach the starter. So if we run a simple test and find that there is in fact electricity making it to the starter, we can rule this out.
Voltage at the starter with no activity generally means that the starter motor itself has experienced an internal failure and requires replacement.
If the starter spins and the ATV’s motor does not start, this indicates a failure elsewhere in the ignition system.
Now that we know what we’re looking for, the place to start would be to put a good charge on the battery. If the battery won’t hold a charge, buy a new one and put a good charge on that before hooking it up. All of these tests are much easier to perform with the ATV’s battery than they are with jumper cables attached to a car battery.
Now grab a multimeter, set the indicator to voltage test and touch the positive lead to the positive terminal of the battery, the negative lead to the negative terminal of the battery, and read the voltage. It should be around 12-volts.
Next trace the positive battery cable to the input side of the starter relay. Using the meter, place the positive probe on the input connection of the relay, ground the negative probe to the chassis of the ATV, and hit the starter button. The meter should show the same voltage as the battery.
Now perform the same procedure on the output side of the relay. If the voltage checks out here as well, you can rule that component out altogether.
Now move on to the starter itself. Repeat the above procedure. If you’re getting voltage to the starter but it’s still not spinning when you push the button, replace the starter and you should be back in business.
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