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    1954 Evinrude 25 - Build Compression, Lose Spark

    I will try to work something out with them. Thank you for this red flag. Yes, now it occurs to me that the power to the coils is from the stator, isolated from the DC bus, so this starter theory is not the answer. Can't hurt to have a peek at the starter and run the armature on the growler...
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    1954 Evinrude 25 - Build Compression, Lose Spark

    Thank you very much for this valuable information and guidance. Sorry for the radio silence. I can only advance the conversation when I receive new information. I am not hands-on with the engine--just a parts man. My posts are admittedly speculative and incorrect. The compression theory was...
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    1954 Evinrude 25 - Build Compression, Lose Spark

    I have a condenser (capacitor) tester so we can test them. The engine is not at my shop; the small engine mechanic has it, so I am working off of descriptions, diagrams, videos and images. My understanding of the mag setup is there is a primary coil up top under the flywheel, and then a coil...
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    1954 Evinrude 25 - Build Compression, Lose Spark

    One tweak to my description of the problem, from the mechanic: Neither plug is installed. Each is mechanically grounded. Have spark when rotating engine. Lose spark on both when a small amount of compression is built in the lower cylinder. Does anyone have a crankcase diagram for a 25014?
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    1954 Evinrude 25 - Build Compression, Lose Spark

    THANK YOU for your advice! We will go over this and update the thread.
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    1954 Evinrude 25 - Build Compression, Lose Spark

    Thinking on this more I like the theory that the crank has slop so that the flywheel goes out of gap spec or physically contacts the stator. Has anyone seen this happen?
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    1954 Evinrude 25 - Build Compression, Lose Spark

    Hello, I am a DC electrical parts man. We're helping a local guy get his 1954 Evinrude 25 (#25014 I believe) going. We are observing strange behavior and this forum seems to be the best place on earth to research it. I have searched the forum and did not come across this specific problem...
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