Go Kart Engine Diagnostics and Repair Part 3

Go Kart Ignition System Repairrespect that as well.
Last time we went through the steps of diagnosing theTo place the new magneto in place, fold a sheet of
faulty ignition system. We first tested for:paper in half so it is two pages thick or even three
- Gaspages. Then place the paper between the flywheel
- The switch was onand the magneto. This will create the necessary gap
- Plenty of Compressionfor good ignition. If the gap is too large, then the spark
- Spark.may be weak. Too close and you will damage the coil
We discovered that the culprit was no spark. We alsoand the flywheel.
determined that the "No Spark" was coming from theYou can rotate the engine so that the magnet attracts
ignition system, not clogged spark plugs or things likethe magneto. Then tighten. Or your can just press
that. For whatever reason, the ignition system was notdown lightly on the magneto (so the paper , the
putting out.magneto and the flywheel are compressing together)
We also determined that the shutdown system (theand tighten as well. Either method works fine.
on-off circuitry) was not the problem.I prefer, however, pressing the magneto down,
So our next step was to look at the key that lines upbecause the magnet can attract more than I like and
the flywheel to the coil. Actually, with the solid stateactually get the clearance between the flywheel and
ignition, you should still get spark, but just at a differentthe magnet a little too close.
starting point in the cycle. Either advanced or retarded.The first thing you want to make sure is that the
So the real culprit is the non-firing coil.Magneto is working. I like to just have the spark plug sit
So what do you do? There are two options: find aon the head and then spin the engine over. If there is
similar engine that is sitting around and take itsspark, then the system is working properly.
Magneto (coil), or buy a new Magneto.Put it all back together!
Most people don't have engines sitting around, soTest run it!
buying is the next best thing.Bottom line is that ignition is the first step in in testing
Be prepared to pay $50+ for a Magneto. Also, it iswhy an engine is not running. Always check the
handy to bring in the blower cover to the shop to letelectrical side of the engine first, then start digging
the tech read the correct Model and Serial Number.deeping in the diagnosis of the engine problem.
In any case, be sure to get the correct Model NumberOur main problem was an engine not running, there
and Serial Number for your engine. Also they will treatcould have been other issues such as no fuel, bad
you better if you have these numbers before askingvalves or even a blown rod.
for the part. Call the part the correct name and they