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    1985 Johnson 120 Goes WOT then falls on face

    As stated beforehand above, if you get DC voltage with key on engine off on either of the stator wires then the regulator/rectifier is bad. The diodes in the device are one way gates, positive AC voltage only should be rectified towards the positive end of the electrical system. Positive...
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    My boat is hard to start after being ran at higher rpms for 10-15 minutes and being shut off.

    If you can't remember the last time it was changed, it is most likely well past due needing replacement. I would also be concerned about the current state of those carbs, when is the last time they were pulled for inspection and cleaning?
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    PSA, triple check your electrical connections anyways.

    A reminder, triple check your electrical connections very closely when diagnosing, especially if you have an intermittent electrical fault where a high amperage item isn't working after being working for a bit then stops. Or when you are working on those cramped trim/tilt boxes with the wire...
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    Loss of power in 1988 Evinrude 88 spl

    It might be a paperweight now but could be worth getting a reputable remanufactured replacement powerhead installed or searching for a similar model range used that has good compression. If you go rebuild route with someone rebuilding yours, make first sure they do those regularly and have the...
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    Loss of power in 1988 Evinrude 88 spl

    Compression test first, spark gap tester test second. What you are looking for is over 100 PSI on all cylinders, within 10% of each reading or less difference. No point going further if compression test fails. You'll have to diagnose the problem before going any further if this occurs. If...
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    Dropped spark on cylinder 4

    When the issue occurs, you need to check with DVA meter/DVA multimeter adapter the voltage level to primary side the coil (Not the coil to spark plug). Then compare it with the factory service manual specifications on what is the acceptable voltage range. When you get a no spark situation or...
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    Mysterious random misfire, VJ90TLASB

    Highly doubt plug wires shorting to block. That would be noticed in close careful inspection while running at idle, which I have done. I don't see any carbon marks on the spark plug hex head/body. Misfire does occur in idle randomly without being under load, but its less noticeable unless...
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    Mysterious random misfire, VJ90TLASB

    Model is VJ90TLASB. I have a mysterious misfire situation that I can't seem to narrow down the issue to. At this current time, I'm leaning towards electrical or something mechanical that isn't cylinder compression (Maybe crankcase sealing rings or some 2 stroke specific issue I'm not thinking...
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    1994 Merc 5.0 2brl Carb issue when off

    I'm curious, did they install a Mercury/Quicksliver 27-34213 gasket or some 3rd party gasket? If that gasket is not thick enough to get the correct spacing from the block, the fuel pump will deliver too much fuel pressure. It's more likely the pump because its only about 1 to 2 PSI over max...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Not gonna happen if the points on the flywheel turner fit in square/perpendicular into the flywheel teeth notches and they are centered for full grip. If you can't get one of the points on the flywheel turner to fit well in the teeth gap, you might need to heat the arm somewhat and bend the arm...
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    Johnson 150 Rebuild/Remanufacture Guidance

    No, I am referring to an actual flywheel turner that uses teeth, this thing. It is also called out/referenced in the factory service manual. The only difference is that its not the Snap-on model that factory manual references. Photo of the results below after a few "motivation" whacks of...
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    Johnson 150 Rebuild/Remanufacture Guidance

    Sounds like the OP is getting close to the time to putting a new flywheel key on and torqueing the flywheel. You'll probably have to do your best on torquing the flywheel as high as you can with it off the midsection, then use the flywheel service tool to lift the assembly on the midsection...
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    94 4.3l lost compression 1-3-5

    Did you do a leak down test yet? That's going to tell you quickly where the direction of the air force is primarily going (head gasket, lower end, head/valves) Don't take the engine head off or more until you identify where the relevant leakage is coming from first using a leak down test.
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    CDI troubleshooting question for 1990 90hp V4 crossflow rectifier/regulator

    The gasket was barely used. In an emergency I would not hesitate to re-use it but I already bought one to go with the new regulator/rectifier.
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    CDI troubleshooting question for 1990 90hp V4 crossflow rectifier/regulator

    I stopped when the next step on the running test was to swap stator wires and did bench test instead, the diode failed on diode test mode (open diode) on the multimeter for yellow/gray striped side to positive The yellow/gray was also the terminal that had the most voltage on DVA reading, which...
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    1989 Johnson 90horse VRO issues

    Be more specific than "bought a pump without the harness and installed". Give us an exact link to what was bought/sourced as the fuel pump. There are a lot of cheap crappy Chinese made marine parts that one would want to avoid like the plague. Then tell us which hoses you hooked up to where...
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    CDI troubleshooting question for 1990 90hp V4 crossflow rectifier/regulator

    I kind of suspected that issue, that's why I bought two of those ground washers, one for each side on the parts schematic. Do I need to clean off any aviation form a gasket on the threads of the bolt threads as well before I install?
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    Boat safety question!

    If the boat capacity can legally take more HP, might be worth selling off that 60/70 hp with at least a 90hp. Might not seem much but it makes a difference when you get a full but safe amount of passengers and gear on that boat. Three full sized adults and a skier on that boat with that...
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    CDI troubleshooting question for 1990 90hp V4 crossflow rectifier/regulator

    I never was able to pinpoint exactly where/when the reverse polarity incident happened. I was however able to diagnose it as a damaged rectifier/regulator without doing that stator wire swap with the marked wires. A bench test was sufficient to diagnose it after a potential regulator/rectifier...
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    CDI troubleshooting question for 1990 90hp V4 crossflow rectifier/regulator

    I have a 1990 90hp V4 crossflow that I recently finished rebuilding and have been ironing out the minor bugs identified. (1 hour or less of run time, under break in procedure being gentle checking things out on the hose) I noticed that the tachometer failed to register after I finished checking...
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