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Good morning everyone, new guy here with a question. I have a 1997 Evinrude 150(E150EXEVC , or UC ) from original owner, my best friend. He thinks the engine lost spark. I have the engine and would like to trouble shoot. I do not have a shifter but the harness has its own key switch. I would like to know if it has a neutral safety switch. I assume it would prevent spark if it thought it was in gear. In the pick below, there are 3 wire looms that have 3 wires each. On 2 of those, there are 3 wires availible to be hooked up. On the last, 2 wires seem to be taped back, leaving only one wire available to hook up. I know one set must be tilt trim, but do not know wich 3 that is. From the pic below, can anyone id thses wires? There is also 1 yellow wire at the key switch that does not seem to have a home either.
The correct model number for your 1997 Evinrude 150 would be E150EXEUC. Yes, since your motor has a Modular Wiring System (also known as MWS) then your harness would include a neutral safety kill switch/ground.
First, the Ignition Switch has a 6-pin connector, including the yellow wire, which is the kill ground.
The 3 wires purple, black and white with tan stripe go to the trim/tilt gauge.
The 3 wires purple, black and gray (not likely used) is for a standard tachometer.
The 2 pin connector with purple and tan with blue stripe wires goes to the warning horn.
You will also have an 8 pin connector that goes to the system check tachometer or system check gauge.
A 3 pin connector with red and white stripe wire, blue with white stripe wire, and green with white stripe wire goes to the trim switch.
I recommend you get yourself an OMC maintenance and repair manual if you wish to DIY - repair the motor. That will make it much easier to maintain, diagnose, and repair.
I appreciate the replies. So that yellow wire, when grounded, would prevent spark.
So as long as its not grounded, it should be able to start and would enable troubleshooting to begin for the no spark..
I know the owner did not have a trim gauge and yes, it has the 8 wire system check gauge.
I am able to get my hands on this book. Has anyone ever used this book? If so, is it decent enough to try to troubleshoot no spark?
Manual Book Service Repair for Johnson Evinrude Outboard 92-01 65-300 HP
