what kind of tach are you using to set the idle rpm, the one in your dash is probably not accurate enough at low rpm, I set the idle rpm usually by ear if i don't have my shop tach handy. I set it high enough where it will idle in gear, but when I pull it out of gear and back in, the boat doesn't lurch and you don't have a big clunk when shifting, try going from fwd to reverse, as long as it stays idling, adn it doesn't shift too harsh, you should be ok
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