1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 282Get this manual
Accessory Connection Electrical Checks 17 1Before disconnecting battery, test electrical accessory plug on remote controlInsert red voltmeter lead into "A" terminal and insert black lead into "c" terminalWith the key switch in the "ON" position, the voltmeter should read battery voltageTo check tachometer circuit, engine must be runningUse C.Dvoltmeter, insert black voltmeter lead into terminal "c" and red lead into terminal "B With engine running, voltmeter should show an output of approximately 10 volts or more Remote Control Servicing
Disassembly
ill systemsFailure to do so could result in injury from ignition
1Disconnect battery cables before servicing electrical
sources (sparks) or from contact with moving parts if accidental cranking or starting occurs
2To remove control handle, loosen Allen head screw three complete turns
3Support control on blocks to allow the control handle to be driven off the controlPlace small punch in head of Allen head screw and tap with plastic hammer to disengage the oontrol handle splines from the hub splinesRemove the Allen head screw and the control handle4Remove three screws halves apart