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Rough idle

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Randy Ferguson

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I have a 2000 Johnson 150 &#40

I have a 2000 Johnson 150 (J150PLSSC) that has what I would call a mild shake at idle in nuetral and at no wake speed. Once the throttle is advanced it smooths out and runs strong at all speeds. I have changed plugs but done nothing else. This is my first boat so any suggestions would be greatly appreciated. Thanks
 
"quick start,may not be releas

"quick start,may not be releasing....it advances timing,..i see this fairly often..a manual is needed to ck it right."
 
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