motor cranks, but won't stay running.

mlchristopher5

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Aug 3, 2015
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Volvo Penta 225 D. New boat for me. Mid-80's Galaxy. Ran like a top two weeks ago. Started on the first try. Went to put it in the water yesterday, turned the key to start, give it gas and it sounds like it's running...revs up in response to throttle. Let the key go from 'start' position to the 'on' position, and the engine won't keep running, dies out immediately. Thought for sure it was a faulty ignition switch...replaced that today, no change.
The fact that it revs with the key in the 'start' position leads me to believe that it has fuel and spark...like I could run it if only I held the key at 'start' all day.
The only thing different between two weeks ago and yesterday is that I installed a trolling plate on the outdrive.

What the hell, man. Frustrated.
 
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