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  1. K

    Power Trim tilt solenoid troubleshooting 79 Johnson v4 100hp 3 wire PTT motor.

    I have recently discovered on my 79 Johnson 100 that the previous owner had Frankenstein wired two relays to the PTT system for up and down (this is for two wire motors late model) which was working but until I later diagnosed a short to ground in the relays which was caused by his wiring of the...
  2. K

    79 Johnson Javelin 100hp V4 power trim/tilt questions.

    Hey there guys I'm working on my 79 Johnson 100 v4 with power trim/tilt. I don't believe the previous owner wired this up correctly and seems it's missing a box where either solenoid or solenoid fuse and relays would hook up. I've been diagnosing why my entire ignition failed starting with...
  3. K

    New thermostats issue! 79 Johnson 100 v4 cross flow.

    I am in need of advise with this pain in the neck thermostat replacement on this 79 Johnson 100 v4. I am in reassembly stage now but as you will see in the pictures the kit came with two cork gaskets and the thermostats has a rubber gasket on them. The rubber gasket on the thermostat don't seem...
  4. K

    CDI troubleshooting intermittent spark Need help please 79 Johnson 100hp V4

    Hello I am trying to figure out this spark issue with my 79 Johnson 100 v4. First off the boat was given to me by my uncle. He bought it when it was running perfectly 4 years ago (2020) brought it home took it to boat mechanic and had them do a once over just to check compression and overall...
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