Re: 115 hp Merc stalls when shifting
Before you tear apart the carbs, just take each idle mixture adjusting screw and turn it approx 1/8 to 1/4 turns CCW (rich). It may just be a case of slightly lean idle mixture, which the Big Sixes don't like.<br /><br />This may make your idle a tad 'lumpy', but it should make the motor less prone to lean-stalling.<br /><br />If you really want to get it tweaked in, with a warmed-up motor and idling in gear in the water, adjust each needle. Find the range by very slowly moving CW until it leans out and begins to slow down. Then, back out CCW (rich) until it begins to slow again. Leave each needle adjusted about 1/8 or so turns to the rich side of the midpoint of the lean-rich range that you find while tweaking the mixture needle back and forth.<br /><br />What this'll do is optimize the adjustment on each carb, and overall you'll have a smoother idle and more consistent takeoff.<br /><br />If you find that you bog down upon acceleration, take each needle 1/8 turn CCW (rich) and then see if it improves.<br /><br />This, of course, assumes no other problems such as dirty/incorrect spark plugs, dirty distributor cap (inside), low compression, etc.<br /><br />Note that a dose of Deep Creep spray in the carbs and Seafoam in the fuel will likely improve running, too.<br /><br />Check out the particulars at
www.seafoamsales.com<br /><br />HTH.......ed
