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    1968 3hp Johnson

    ran this motor good. probably 4 -6 hours of mixed running over 2 or 3 days. Seems to run great. Think at some RPMs I'm rining the flywheel like a bell. I'll probably mess around with it Wednesday, next time I run it. Think I'll just put tape on the flywheel to see if it changes the...
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    1973 4hp Evinrude

    I did check the timing with an ohm meter. It was opening just on the slow side, of the two marks. Right on the 2nd mark, but it supposed to be in the middle. My guess points a bit worn, either I'll replace them or just gap them a bit wider to adjust the timing. Motor seemed to run pretty...
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    1973 4hp Evinrude

    just some clowns on another part of the internet. they did jump right on a knock sensor, but just trying a timing light, and maybe running colder plugs, or a bit more oil in the gas, they went right to engineering a knock sensor on the fly. I'll let someone else try that if it ever happens...
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    1973 4hp Evinrude

    thanks for reading or commenting, this motor was a project so far for sure. I just want to practice working on one, and this one has been good for that. can anyone recommend a timing light that works on these well? can you rig a battery and bulb to these? for static timing, can I just put...
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    1973 4hp Evinrude

    I got some feedback on another forum vintage section, the white spots on the electrode are likely detonation or preignition. They are egging me on to install a knock sensor, but I'm not sure I'm that advanced mechanically, so - maybe I'll just use this as an excuse to pick up a timing light. I...
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    1968 3hp Johnson

    got that nozzle out. the end is buggered, but it could probably still be used, but I got a replacement I'll use. another piece for the odd parts bin. I heated it up good and applied solvent and penetrating oil, let it sit, heated it up again an hour or so later and applied more penetrating...
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    1973 4hp Evinrude

    trying to share some plug pics. top cylinder on right, bottom on left, these are new plugs, they did some test runs, and then about a 10 minute ride around a pond Champion j6c...
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    1968 3hp Johnson

    I'm betting on the carb. probably put 4 or 5 hours on it this weekend, I'm going to run it some more with the 24:!1 gas, and just set it at some steady trolling speeds, and see how consistent it runs, and check the plugs after. The tapping noise is either piston slap or I'm hearing something...
  9. F

    1968 3hp Johnson

    Doesn't chirp at full throttle running 24:1, a little bit at about 1/3 throttle when throttling down. Ran GPS speedometer, 10 mph max on a 12 foot Mirrocraft aluminum rowboat. It will be interesting to compare running when I finally get the 3hp carb put together with the new nozzle. Probably...
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    1969 Evinrude 9.9 model 9622-A help

    You gotta get back there and see what is acting as a stop.
  11. F

    1968 3hp Johnson

    Still made the same chirp at a mid RPM range on the heavier mix. Ran seemingly the same to me, maybe it just needs to break in a bit. I have no idea the last time it saw any actual use. Sounds like bearing or bushing chirp to me. Maybe it is just a resonant frequency and it is air or a reed...
  12. F

    1968 3hp Johnson

    Ran this on a 12 foot rowboat today. Granted on a 4hp carb. Seemed to run really strong, idles down super slow. Gave it a few good runs to fine tune the needles. At about 1/3 to 1/2 throttle there is a spot where the motor chirps like a bearing. Found it decelerating, but the same spot is...
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    1973 4hp Evinrude

    What is the preferred way to test for blown crank seals without a pressure test set up. Can I just spray carb cleaner in a couple particular spots, and it would become apparent? Just a general question on these things that I wondered about. These motors make a little sluge ring on the inside...
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    1973 4hp Evinrude

    tested tank on other motors works fine fuel pump is new tested same carb on another motor runs fine I had hoped this was a fuel system problem, cause that would be easy. I think I'll finish cleaning up another 4hp Carb, and put it on and think about running this again. Maybe I'll just put new...
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    1968 3hp Johnson

    I tried to get that carb nozzle out, with a propane torch, PB blaster, and a set of vice grips that seem to grab good enough, but it doesn't turn, eventually the vice grips turn, and make my nozzle slowly narrower and narrower. I heated it up and sprayed it again and left it. New nozzle on the...
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    1968 3hp Johnson

    ran this with the 4hp carb on a 12 foot rowboat, and it was OK, not great - cutting in and out, must be dropping a cylinder. I had another 3hp carb on an Evinrude of the same year so - I tried it, better, still one cylinder cutting in and out. When it runs strong, can tell it should run like a...
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    1973 4hp Evinrude

    I tested the tank on another motor, so - rules that out. Not sure when I'll get to run this again. I'll probably clean the carb and check the head to see if I find any signs of leaking, and run it again.
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    4HP 1982 Evinrude not starting

    take an extra spark plug, and pull the boots and test cylinders for spark with the spare plug. if there is spark all around, try to start it again. if it won't start, pull the plugs and see if they are wet or dry. dry is no gas, probably plugged up carb.
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    Number one cylinder no spark while starting

    swap a couple of the plugs and see of the problem moves, might just be a fouled plug making a weak spark.
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    1978 Evin 70HP starts and runs great but after 10min or so bogs

    that sounds like a failing coil
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