Tecumseh Yard Machine (156cc) does not start and there’s no combustion: Does this sound like an ignition coil issue?

How do you test a lawn mower ignition coil?

Or a twin cylinder let's say an opposed if it's a single cylinder go ahead and unplug your kill wire. And then turn your engine over and see if it starts or check for spark.

How do you test a small engine magneto?

Holding the plastic handle of the screwdriver, bring the metal area of the screwdriver close to a metal part of the engine, being careful not to touch it. Have someone start the mower. If you don’t see a spark between the screwdriver and the engine, the magneto is bad.

How do I know if my lawnmower is getting spark?

If by chance when you remove the plug to check for spark. It's really wet you may have flooded the engine. If you think I flooded the engine put the plug back in hold the throttle wide open.

What causes no spark on lawn mower?

If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.

What would cause an ignition coil not to fire?

There are a few reasons for no spark, new coil pack could be defective, crank sensor, ignition module or bad wire in primary circuit, faulty ECM/PCM. You may have to have a good technician have a look, diagnose and estimate repair.

How do you test a coil on a Tecumseh engine?

If a spark jumps across the terminals in the tester window or the engine starts the spark plug and ignition coil are working properly. If you do not observe a spark unclip the tester from the plug.

What causes no spark to the spark plug?

Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.

How do I know if my lawnmower spark plug is firing?

Turn the lawn mower’s ignition switch on and pull the rope to spin the flywheel. Watch the spark tester or spark plug, looking for a spark between the electrodes of the tester or spark plug. If a spark is present, the ignition coil is working properly.

How do I fix no spark?

If you do not see a spark, there is an ignition problem. Remove a plug wire and insert an old spark plug or a spark plug tester into the end of the wire (the plug boot). Place the spark plug on a metal surface on the engine, or ground the spark plug tester to the engine. Then crank the engine to check for a spark.

What if my ignition coil has power but no spark?

If the ignition coil does not have spark, it’s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.

Can ignition switch cause no spark?

No spark is one of the most common causes of a no-start condition. It’s the first thing I check for. … The igniter or ignition module, the pick up coil or crank sensor, the cam sensor, and the ignition switch are included.

What causes no crank no start?

If an engine cranks but refuses to start, it lacks ignition, fuel or compression. Was it running fine but quit suddenly? The most likely causes here would be a failed fuel pump, ignition module or broken overhead cam timing belt.

How do you diagnose a crank no start?

Inside your air intake hose. You either remove a sensor or undo. This from there filter box spray some of this in there and then if you can start the car and it runs for a couple seconds.

Can ignition switch cause no crank?


If nothing happens when you turn the ignition switch to the start position, the problem may be a bad ignition switch, or it may be a fault in the starting circuit.