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1972 johnson 85 horse electronic box problemno spark

art

New member
this motor hasn't been st

this motor hasn't been started in 3 years and before that was only run for a week 5 years ago. the OMC electronic box was replaced twice before being run that week. tried starting it today and no spark. can't afford to keep changing the box. my question is: is there a way to change the box to a different system on this motor? I think they changed to a different system after 72 or 73. any help will be appreciated.
 
"Art... The following info may

"Art... The following info may be usefull to you.

(Battery Capacitance Dischage Powerpack Test)

Purchase a small 12v bulb at your local automotive parts store (the 12v bulb is to look like a flashlight bulb, not a headlight bulb). Solder two wires to that bulb, one to the side of the bulb (ground), and the other to the positive point.

Remove the spark plugs. With the key in the on position, make sure that you have 12v going to the pack at the terminal block (purple wire). Now, connect the ground wire from the bulb to any powerhead ground. Connect the wire from the positive point of that bulb to the powerpack wire that is connected to the coil wire on the terminal board (blue wire).

Crank the engine and observe that bulb closely (CLOSELY!). If that bulb glows even the slightest bit, the powerpack is okay. It may be a very dim glow... just so it glows! If it doesn't glow, the pack has failed.

Keep in mind, that type powerpack (Battery Capacitance Discharge) demands a top notch battery of at least 70 amp hours. Any less will, in time, cause powerpack failure.

Joe
"
 
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