1975 Evinrude 2HP Model 2502 Full Factory Service Manual, Page 23Get this manual
3- 7 bThe lea! is so designed that it maintains constant contact with the
leaf plate until predetermined pressure is exer ted against itLeaf travel away from the plate is limited to 1 4" by the leaf back-up plateWhen pressure is removed, the inherent spring action of the leaf seg-
ments returns and holds them against the plateAttach the leaf segments and leaf stops to the leaf plate, aligning leaves with marks on plateSee Figure 3-10c Apply OMC Screw Lock to leaf valve screw threads and tighten to torque specified in Section to avoid distortion of the leaf plater::;:JNOTE DO NOT lift or bend leaf segments by handThis may damage
them so that the leaves would have to be replaced
dExamine each leaf carefullyEach leaf must lie flat against the
plate with no edges turned up or away from the plate
REASSEMBLY OF LEAF VALVES, IN TAKE MANIFOLD, AND CARBURETOR TO MOTOR
a Place new gaskets between the leaf plate, intak manifold, and crankcase, and attach to crankcase with four screws USing new gasket, place carburetor in position on manifold studs and fasten in place with nuts