gripit

I'm adjusting the carb on this 420 HP engine. What should the correct idle RPM be? Then what should the rpm be on the first click position on the throttles? Your imput is very much appriciated!!

hillbilly24

I'm not certian on the exact idle spec but somewhere around 650-700 RPM, maybe just a little higher if it stalls when you drop it in gear in in the water. There is no spec for RPM with throttle at first click, that will vary widely from engine to engine.