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I have a 2008 SVH hull with a 2014 SVHO engine.

The idle and starting a really problematic. Once it idles poorly 5-10 secs it seem to perform better after that. They when it stops it can be hard to restart. Every now and again it stalls when you decelerate. We have changed the spark plugs, run a compression test, put the Yamaha computer, checked the injectors, checked the timing...

Everything is within the Yamaha parameters and can’t find the problem. Any suggestion?
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