Bad timer base sensor, how can I generate the voltage to fool the power pack

[monkeystealer]

Title says it all really.

The timer base sensor on my ancient Evinrude 50hp (50173s) 1971 motor is bad (fell to bits when I took it off too). This motor has been running previously, but its been sat in my garage for the last couple of years.

Its not sparking because of the bad timer sensor, but I don't want to fork out the $$$ for a replacement until I can prove the rest of the ignition system is in shape. The neon testers recommended in the handbook have a functionality that appears to be able to generate the trigger voltage to the power pack - does anyone know if there are alternative (and cheap) ways to generate this trigger voltage?

PS. It took me ages to find the Johnson/Evinrude troubleshooting guide by CDI Electronics for these motors.
Heres a link to the guide http://web.archive.org/web/20100920...er 1971-1978 (Screw Terminal Power Packs).pdf

Thanks

 

[JDusza]

Re: Bad timer base sensor, how can I generate the voltage to fool the power pack

7. With another person’s help, verify the triggering circuit inside the power pack as follows: Disconnect the timer base wires
and using a good 1-1/2 volt battery (AA or larger), connect a jumper wire to each timer base terminal. Hold one jumper wire
to the negative side of the battery. Have the other person crank the engine over and tap the remaining jumper wire to the
positive side of the battery. (Be careful not to touch the engine or stand in water as the triggering circuit is ‘riding
high’ on the high voltage inside the power pack). You should get a spark from the ignition coil with each tap. Reverse the
connections to the battery and test again. If you get sparks from both tests, the power pack should be OK.

Hate to tell ya, .... this is a dead lift from your linked guide.
Am I missing your question?
J

 

[monkeystealer]

Re: Bad timer base sensor, how can I generate the voltage to fool the power pack

7. With another person?s help, verify the triggering circuit inside the power pack as follows: Disconnect the timer base wires
and using a good 1-1/2 volt battery (AA or larger), connect a jumper wire to each timer base terminal. Hold one jumper wire
to the negative side of the battery. Have the other person crank the engine over and tap the remaining jumper wire to the
positive side of the battery. (Be careful not to touch the engine or stand in water as the triggering circuit is ?riding
high? on the high voltage inside the power pack). You should get a spark from the ignition coil with each tap. Reverse the
connections to the battery and test again. If you get sparks from both tests, the power pack should be OK.

Hate to tell ya, .... this is a dead lift from your linked guide.
Am I missing your question?
J

How the hell did I miss that!

Thanks !!