I don't know, good for you to get a factory service manual.
You should have your motor in a tank of water so you have backpressure at idle, outboards never idle well on muffs.There like Harley's they just don't idle all that well.
If you have a problem with your motor, this forum will help you fix it, you just have to tell us what your motor problem is,We are standing by to help you fix your motor problem what is it for you to make it here?.
