1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 88Get this manual
f'15l5If the adjustment is too rich, notice your reference mark and turn the needle 1112 revolution clockwiseWaiting 15 seconds after each adjustment, repeat this procedure until you reach the highest consistent RPM6Repeat Steps thru for each carburetor7To test your adjustment, run engine near full throttle for three minutesReturn the engine to idle in gearThe engine should maintain smooth idle RPM If your test results vary, repeat Steps thru 5If the engine does not respond properly to these adjustments, check the following: Engine temperature Linkage adjustment External recirculation system Sufficient exhaust back pressure
Important
Intake Manifold Servicing, All Models
Removal 1Follow steps listed in Carburetor Removal, this Section2Remove manifold screws and remove manifoldDisassembly 1Remove two screws per leaf plate assembly and remove the leaf plate assemblies as requiredINotel Do not disassemble leaf plate assemblies unless leaf plate seats, leaf valves, or leaf stops are damaged or corrodedCheck parts availability before servicing leaf plate assembliesSome assemblies on some models are not serviced in detail2When disassembling leaf plate assemblies, do not lift or bend leaf valvesRemove the leaf stop screws and remove the stops, shims, and leaf valves3When disassembled, keep the stops, shims, and leaf valves separated by assembly