Mercruiser 250 hp reving on start

Elmo Fudd

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Joined
Jun 12, 2015
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I have a 2002 Mercruiser 250HP Bravo 2, last fall while winterizing everything was fine with exception of a little dieseling or run on after shut down.
This spring, when I start the engine it automatically revs to full throttle. I even unhokked the throttle cable to see if this was the culprit, it was not. Could this be caused by the distributor?
 
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