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  1. H

    2005 PLSOR cuts after starting

    Case summary. Symptom: 2005 Johnson J115PLSOR fires up, but dies as soon as the starter key is released. Additional observation: Engine continues running when +12V is supplied to the Y/R connector at the power pack. Stator testing: Results were inconclusive—probably due to a less-than-ideal...
  2. H

    2005 PLSOR cuts after starting

    Quick update. Low-voltage side appears innocent. Narrowed it down to either stator or powerpack. I'll have local shop test output on both, because I do not have the equipment to load-test that stuff.
  3. H

    2005 PLSOR cuts after starting

    Y/R is Start, but there is also a branch to powerpack that I overlooked. Pu runs from ignition switch to reg/rec, and then to OMS, and branches off to dash before that. Since I lose dash when I release starter, I can only conclude that Pu voltage collapses then; will have to check tomorrow. I...
  4. H

    2005 PLSOR cuts after starting

    Oops, I guess there IS a weird Y/R branch to powerpack. I stand corrected. So if it supplies juice to the pack while cranking, and then coils take over, except that they don't, and coils are nominal, what is my problem, then? Safe enough to disconnect Y/R at the pack and see if it runs with...
  5. H

    2005 PLSOR cuts after starting

    That's roughly my next step once oscilloscope arrives. I bet I'll see a voltage dip on R/Pu when starter disengages and work from there.
  6. H

    2005 PLSOR cuts after starting

    Nope. Not on the powerpack, not on the diagram. Y/R starts at ignition switch, runs to shift interlock and then aft to solenoid. Nothing else is connected to it as far as I can see.
  7. H

    2005 PLSOR cuts after starting

    None of the above. I have other reasons to rule that out, too. Willing to bet a case of beer it is electrical.
  8. H

    2005 PLSOR cuts after starting

    This is interesting. R/Pu+Pu - ignition and power to dash. R/Pu+Y/R - crank. Is powerpack really feeding off Y/R while cranking, and how - because on this model Y/R ends at starter solenoid?
  9. H

    2005 PLSOR cuts after starting

    I did disconnect ignition switch and jumped R/Pu, Pu, and Y/R directly. Checked B/Y (kill) for ground shorts Not sure what jumping at motor would tell me that I don't already know.
  10. H

    2005 PLSOR cuts after starting

    The mystery deepens. Stator coils are in specs per factory manual. I'll probably wait until oscilloscope gets here so I can detect what in the world happens to voltage and when.
  11. H

    2005 PLSOR cuts after starting

    Hm. Apparently there is only one fat cable from batt+ to the solenoid. From there, three red wires branch off — to trim, reg/rec, and the brains. I would expect the brains to remain energized regardless of what the engine is doing, unless there is some stator-dependent circuit I am overlooking...
  12. H

    2005 PLSOR cuts after starting

    More problems with J115PLSOR 2-stroke. Starts fine, but the moment I release the starter switch, it dies immediately. What gives? What I know so far: Not the ignition switch — same behavior even when bypassed completely. Not the kill circuit — checks out fine. Not fuel-related — it dies...
  13. H

    Water temp or head temp?

    So I got that dual-temp gauge from a company I won't provide with a free advertizement. Put the sensors into water pressure ports. Works acceptably well showing cooling water temps. Apparently, the motor (j115plsor) has a blind hole in each head that also looks like 1/8 NPT. I wonder if that's...
  14. H

    2005 J115PLSOR weird oil leak

    Probably not, the block is clean all the way down. The seal and driveshaft are right there, and there seems to be just enough of an opening for the spinning shaft to sling gunk around.
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    2005 J115PLSOR weird oil leak

    I'd rather have it come off than have the crank seal blown.
  16. H

    2005 J115PLSOR weird oil leak

    It IS, if it (partially) fills with liquid.
  17. H

    2005 J115PLSOR weird oil leak

    Fair enough, I was keeping it under 3K per break-in instructions. I do suspect I have excessive crankcase pressure issues, because recirc hose kept popping off
  18. H

    2005 J115PLSOR intake overpressure/raw gas?

    By way of an update, replaced reeds with Boyesens (and also replaced primer gasket). That cured most of the problems described here. Smoke is down to acceptable levels.
  19. H

    2005 J115PLSOR weird oil leak

    It does feel like half-evaporated 2-stroke mix. Except that it almost looks like it's coming out of the bottom of the crank - everything above the exhaust housing spacer is nice and dry. Combined with the fact that I see more oil/fuel in exhaust than I am comfortable with, I wonder if fuel pools...
  20. H

    2005 J115PLSOR weird oil leak

    It's just that, one, there is nowhere for the stuff to come from but the crankcase (and if it does, why it is pooling in there?), and two, I can't see where it's coming from - between the powerhead and midsection?
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