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Harkonnen replied to the thread 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...

May 29, 2026
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Harkonnen replied to the thread 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...

May 21, 2026
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Harkonnen replied to the thread 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...

May 19, 2026
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Harkonnen replied to the thread 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...

May 19, 2026
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Harkonnen replied to the thread 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.

May 19, 2026
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Harkonnen replied to the thread 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...

May 19, 2026
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Harkonnen replied to the thread 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.

May 19, 2026
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Harkonnen replied to the thread 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...

May 19, 2026
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Harkonnen replied to the thread 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...

May 18, 2026
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Harkonnen replied to the thread 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...

May 18, 2026
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Harkonnen replied to the thread 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...

May 18, 2026
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Harkonnen posted the thread 2005 PLSOR cuts after starting in Johnson & Evinrude Outboards.

More problems with J115PLSOR 2-stroke. Starts fine, but the moment I release the starter switch, it dies immediately. What gives? What...

May 17, 2026

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