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Hi All, I am the proud owner of a 1974 Islander 30 Mk II. I have been bringing her back for a couple of years now along with sailing and enjoying her assets. Lately a problem has started to manifest itself. When the engine is running(Palmer P-60) and I turn it off at the key it keeps running. I have been told that the blocking diode is faulty, however I pulled the alternator and regulator and had both checked and they checked out ok. I also changed the switch thinking that could be part of the problem. Any help or advice on this issue would be greatly appreciated,,,,,,,
Rick
 

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Wild guess, assuming the P60 is a gasoline engine it must have a conventional ignition system and it can only run as long as it gets spark from the spark plugs. They get power from the coil, which gets power from the ignition switch possibly via an ignition relay. If that relay were stuck in the closed position, because old relay contacts sometimes stick shut, that's all it would take to keep the engine running. Look in between the ignition switch and the coil for an ignition relay, if you whack it and that stops the engine--that's the problem. (Of course you could also unplug it, inspect it and test it more gently.)
 
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