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1981 Johnson 70 No Spark

J

Jake1ekaj

New member
Gents,

I'm trying to get my parents old boat running so they may sell it. It sat for 12 years and I was hoping it would fire right up after replacing the plugs, battery, cleaning the carbs, fresh gas and such. However, that is not the case. This thing has always been a solid runner, and it has been sitting in the garage. Anyway...

The safety switch on the remote control, can it be fully depressed or just partway. The original is lost. I was going to model one and 3D print it. In the mean time, I have been having my son hold it while cranking the motor.

Anyway, there is no spark at any of the plugs and I could use a hand pretty please. I have a dvm and I'm not afraid to use it.


motor plate.jpgside motor.jpg
 
Put up a pic of the switch. You can buy those clips for pretty cheap. It depends which switch you have, if it's the switch with a small button in the middle that uses the 3 prong tether it pushes in. If it's the switch that has the larger button and uses the 2 prong tether it pulls out. That will kill your spark if it is not working or the tether is on.
 
The switch is a plunger that the tether full envelopes and depresses the switch.

I pulled the control apart and probed the wires running into that switch. When the button is not depressed, there is continuity between the wires running into the switch. When depressed, continuity is lost.

I'm assuming that is normal?

One other thing. There was no battery installed when I started on this. Dad is not the type to stick with common wiring color scheme (red +, black -). The mains pos & neg were easy to identify, and some of the auxiliary wires were too. However, there were a couple I wasn't not sure of the polarity.

Do the two large wires, approximately 4 gauge, feed the primary circuits in the boat? Such as lighting, charging and such.
Could the the other wires be disconnected?
 
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