FAQ: What Should I Check On My Mercury 35 Horse Outboard Motor If I’m Not Getting Spark?

Why is my outboard not getting spark?

Spark Check: Your outboard needs spark at the spark plugs in order to start. Check each plug and wire individually. If you see a strong blue spark, the ignition system can fire the engine. If no spark on all cylinders, the culprit is typically the key switch, kill switch or ignition power pack.

What would cause a motor not to get spark?

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.

What are the symptoms of a bad coil on an outboard motor?

Bad Coil Symptoms in an Outboard Motor

  • Cracked Body. The coil on your outboard is a sealed unit.
  • Hard Starting. If the coil is weak or damaged it will produce less spark energy than it is designed to.
  • Engine Misfires.
  • No Spark at Spark Plug Gap.
You might be interested:  Question: What Is A Normal Horse Price?

When I turn the key on my boat nothing happens?

If you turn the key and nothing happens and all else checks out then possibly a bad switch or cut, broken, or corroded wire on the neutral safety switch on the trans. You could try moving the throttle at the helm forward and back and see if it cranks.

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.

What if my ignition coil has power but no spark?

No spark indicates an ignition problem. If an engine has a coil-on-plug ignition system with no plug wires, remove one of the coils from the spark plug and insert an old spark plug, a spark plug tester or a screwdriver into the end of the coil. No spark indicates an ignition problem.

How do I test my ignition coil without 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.

What happens if coil pack goes bad?

Coil Pack Problems Usually, if a coil pack is bad, there will be a loss of fire or spark in one or more cylinders. This causes what’s commonly referred to as misfiring. Misfiring can cause drag on the crankshaft, and usually results in a very poor performing engine.

You might be interested:  Question: How To Start A Horse At Liberty?

What are the symptoms of a bad CDI box?

Symptoms could include misfiring, dead cylinders, backfiring, bizarre tach behavior, and countless other things related to how your engine’s running. The problem may get worse as the bike warms up. It might not even hold low revs at all.

Will a boat motor run with low compression?

Will An Outboard Run With Low Compression. Yes, an outboard will run for a little while with low compression. If the compression is too low though, it will not run at all.

Do all boats have a kill switch?

An overwhelming majority of boats have a kill switch system set up, USCG officials said.

Why is my outboard hard starting?

Make sure the engine is primed with fuel and choked properly at start if necessary. Improperly connected spark plug wires can make starting your engine difficult. Make certain all spark plug wires are properly connected and free of breaks. Also, check that the distributor cap and rotor are functioning properly.

Why is my outboard losing power?

Boat Engine is Sputtering and Losing Power You most likely have a filter problem or fouled plugs. That could be why your boat motor is losing power. Solution: Replace the in-line fuel filter. Prevention: It’s possible to buy a bad load of fuel, but it’s more likely that the fuel went bad while in your boat.

Leave a Reply

Your email address will not be published. Required fields are marked *