My 15 hp mercury 4 stroke idles high when hot

haliaetus

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Joined
Aug 2, 2009
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I've got a 2007 Mercury 15 hp 4 stroke; It's got about 40 hours and is great little motor for my 14 ft Alumacraft. But recently I've noticed a little problem.

When I first crank it up, it purrs just like it should. However, after running for a bit and warming it up, it idles high.

Any ideas what the problem could be, and how I could fix it? Thanks!
 
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