1986 70hp merc sputtering under load

Jason JV

Recruit
Joined
Jul 16, 2011
Messages
2
My motor is starting and idling fine but when running in gear seams to be starving of fuel. Compresion checks out good, new plugs, new gas, and new bulb and fuel line. Seems to be a carb problem. There is 2 carbs for 3 cylinders, do both carbs service all three cylinders or does 1 serv 2 and the other serv 1? Someone told me to try adjusting the float needle. How?

Please help.
Thanks JV
 
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