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  1. Lord Tywin

    02 Merc 60HP 3cyl stopped firing

    Helping a neighbor diagnose his problem. It ran great, then suddenly stopped sending spark to all 3 cylinders. We dont have a manual or a wiring diagram and are looking for some input on what may have caused this. Main fuse is good and everything works except no spark. Any troubleshooting tips...
  2. Lord Tywin

    89 J70 Temp Sensor/Limp Mode

    Overheat sensor engaging SLOW during WOT...how to troubleshoot Finally localized an issue of WOT for 2-5 minutes causing SLOW mode on my 89 J70TLCEM. Disconnected overheat and issue goes away. Almost just bought a new one but wondered if it was actually the issue. I can check the temp of the...
  3. Lord Tywin

    '89 J70 runs fine wide open...for a few minutes, then not so much

    If I run this around 70% throttle it will run all day. If I push it to full throttle it runs fine for about 5 minutes or so. Then it acts like it drops a cylinder. It will "fast idle" back home or if I turn it off for ~5 minutes it goes back to normal. One thought was some trash in a carb but I...
  4. Lord Tywin

    89 Johnson 70HP runs WOT for ~5min but then acts up...

    If I run this around 70% throttle it will run all day. If I push it to full throttle it runs fine for about 5 minutes or so. Then it acts like it drops a cylinder. It will "fast idle" back home or if I turn it off for ~5 minutes it goes back to normal. One thought was some trash in a carb but I...
  5. Lord Tywin

    89 Johnson 70 Tilt/trim wont go down - stuck up

    My 89 J70TLCEM worked fine ever since I got it a year ago. Last night I docked and raised the motor all the way up. Got on today and everything works electrically except the trim. It does nothing, no noise etc. Tried checking the main fuse and all electrical components and even had my wife hit...
  6. Lord Tywin

    Johnson 70HP OMC Buzzing sound from near switch and boat wont start.

    I hear a buzzing sound sometimes when I try to start my boat. Usually I dont hear it, the boat starts fine andI have no issues. Then sometimes it just makes this humming sound and the starter or solenoid will not engage. I took the cover off the switch and see what could be a piezo buzzer wired...
  7. Lord Tywin

    89 Johnson J70TLCEM Carb mixture

    Forgot to attach pic...
  8. Lord Tywin

    89 Johnson J70TLCEM Carb mixture

    One or more more of these carbs are running very rich. Is there a mixture adjustment that I can tweak and check? The diagram doesnt seem to show it.
  9. Lord Tywin

    Odd stuck starter, 3 times in a row??

    My starter on my 89 Johnson 70 (J70TLEM) stopped engaging regularly so I ordered a new one. After replacing it, the new one didnt engage either so I returned it as some people stated that theirs didnt work out of the box either (although most were very happy). Ordered a different brand and...
  10. Lord Tywin

    89 Johnson 70 32V 20A mini fuse?

    While still troubleshooting my PTT today I pulled apart a red boot that had a retaining wire on it. It was located next to what appeared to be the main wiring harness plug (male/female). When I got it open I found a tiny 32v 20a fuse that was burned. I've never seen a glass fuse this small. It...
  11. Lord Tywin

    Feels like a lost cylinder

    89 Johnson 70 3 cylinder has been running fine, then last night at a decent cruise it dropped power. Felt like all cylinders werent firing. I throttled back and at a fast idle it was ok to limp back. I pulled the plugs, saw visible oil on a couple and swapped them out with a couple I had from...
  12. Lord Tywin

    89 Johnson 70 Tilt and Trim troubleshooting

    I have started having issues raising the engine via tilt. It goes down fine, but doesnt want to come back up. I checked the switch and have continuity to the harness up and down. I then found the relays, pulled them out. They were gunked up on the plugs so I cleaned them and it started working...
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