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What would cause no spark at the spark plugs on a mercury 125 outboard?
Wiki User
∙ 16y ago
The most likely cause would be the stator assembly. By disconnecting the cannon plug for the key switch harness, at the engine, you can isolate the problem to the engine, or the ignition switch / harness assemblies. With the harness disconnected, spin the engine over with a starter button, connected to the solenoid. If the engine now has fire, the problem is in the ignition kill circuit, (ignition switch, emergency kill switch, or harness assembly). If a no fire condition still exists, the problem is in the ignition system, on the engine itself. The stator, and related ignition components can be tested with a volt / ohm meter.
Wiki User
∙ 16y ago
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