1977 Evinrude 4HP Outboards Service Manual, PN 5303, Page 22Get this manual
REASSEMBLY OF CARBURETOR AND LEAF VALVES TO MOTOR aAttach leaf plate to power head using new gaskets on both sides of plateSee Figure 3-4bUsing new gasket, place carburetor in position on manifold studs and fasten in place with nutscReconnect fuel line to carburetordInstall choke knob
NEEDLE VALVE ADJUSTMENT HIGH-SPEED NEEDLE aSeat high- and low- speed needles gentlyDO NOT force needles against seatsBack out highspeed needle 3 turn, and back out low-speed needle 1-3 turnsbStart engine
CARBURETOR ADJUSTMENT
THROTTLE CAM ADJUSTMENT aSet speed control lever to stop pOSitionbSlowly advance the control until the cam follower just begins to open the throttlecThe radiused contact point of the cam follower must be centered between the two marks on the throttle camSee Figure 3-15