Testing mercury stator

Topic: Mercury Stator Resistance Readings, testing mercury stator. Since switch was funky anyway--it was sticky, even after testing mercury stator non conductive lube in hole--[the ignition switch was] replaced with new Mercury part. Initially [there was still] no spark, but I wasn't sure I was getting a good ground to plug. After attaching a ground wire to [the plug] there was spark, but not a good, bright blue color, and not the good "snap" I like to hear.

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Testing mercury stator

I have a Mercury 4 hp single cylinder that has no spark. I filed the points, soldered on new wires as the insulation was cracked. I had spark initially and then nothing. I did some checking and followed a how to video and have determined the coil is dead by checking with an ohm meter. The coil is expensive enough. But the cost of the stator far exceeds the value of this motor. Thank you for the article. In other words, a simpler explanation how to test it. Electrical problems confound me and humble my ego quickly. Unfortunately youtube doesnt have this how to for me. CDI furnishes a brief troubleshooting procedure. I have attached their PDF below. And; as Dave mentions….

This allows you to visually observe the spark.

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Your outboard stator is the "powerhouse" of your outboards ignition system. Most Mercury Outboard Stators perform two important functions 1. They provide voltage to your switchbox or CDM's. They charge your vessel's battery s. A faulty or failing stator can cause one or more symptoms. Engine fails to run and has no spark.

Testing mercury stator

Are you noticing anything wrong related to the battery and engine? Therefore, you must detect the signs of a bad stator. The most common signs of a bad stator in a Mercury outboard engine are problems with engine activation, lack of power, and misfiring. Getting panic attacks? Thus, you can overcome them in the future. Besides, the maintenance tips will let you keep your stator in better condition.

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It is always fun to fix something yourself and get it going again. The motor started instantly, first time. Chris said:. Joined May 25, Messages 3. On the starboard side of your engine is a fitting with one of the oil hoses connected. That is the first test for ADI motors. Skip to content 3cyl stator testing specs. Often this coil is referred to as "the stator. Chris Supreme Mariner. Its not your dads engine anymore. I installed 6 new coils, 4 were cracked 0 improvement. Engine stalls frequently. However, when reading posts on a Mercury outboard specific site, one of the first indications of a problem with the lower speed winding is weak spark when cold, but enough that the motor will start.

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Some failures only show up clearly after the motor has reached operating temperature. You must be logged in to reply to this topic. I very much enjoy learning new things, and try to see mechanical problems when they arise as opportunities, though sometimes that perspective is difficult to grasp at the moment. Cleaned out the screen with a toothbrush and all was well. If you intend to perform your own service on your motor, the purchase of the factory service manual is a very good investment. The dealer in Canada said I have a bad stator part A21 or possibly a bad switch box part A7. If you happen to come across a good explanation of how the two stator coils are used with regard to the spark voltage generation and the ignition timing, I would like to read it. The problem is very intermittent and has only happened a few times both of which were at the end of the day after a long hard run which made me think a heat soak hits it hence my though process with the stator as they don't react well with heat I may be being to smart for my own good and just let you guys guide me through what I should do, but in this case, looks like I would have needed to go down this path or catch fire someday soon. In my case, when the motor is cold it idles strong.. I have one coming, but it won't be here for another few days, and the boat is in a buddies boat house, apart. So, once again, I've learned a lot of new things, and have enjoyed the process. Not even close to enough power to get up on plane again. Still, I would toss a black stator as far away as I could. Can anyone confrim which part number is correct?