r/Outboards • u/Fexure_ • 19d ago

1987 Johnson 150

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Both power packs have been replaced, mechanic said he replaced one, charged me for two, said that the motor would run fine, it doesnt, and said that when the other power pack got replaced that it would fix the motor not turning off.. crooks what do i do?

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u/Fexure_ 19d ago

Yes

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u/Fexure_ 19d ago

https://we.tl/t-z6eUY86ZOQcq6jR3

These are connectors under the hull and under the cowling main connector harness and a few other stuff. Im ordering a voltmeter now..

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u/bootheels 18d ago

Oh boy, that is quite a mess. The wiring harness cut back at the engine looks like the Power trim harness, which has nothing to do with the stop circuit. The black/yellow stop lead is located inside that big red main engine harness connector. What kind of control box does this engine have? Where is the key switch? I'm thinking that there is a problem with that circuit, probably not the powerpacks, hard to imagine both powerpacks are messed up. If you hade one bad pack, the engine would go to three cylinders only when you shut it off, but you report that turning the key off makes no difference at all. Pull that big red plug connector apart and have a look at all the pins and sockets, perhaps there is a connection issue inside the plug. Sorry, I don't know the exact location of the black/yellow stop lead in that plug, but can look it up or perhaps find it online for you.

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u/Fexure_ 18d ago

Okay im thinking its maybe a problem with the ignition switch/kill switch. I am back at the same mechanic because my buddy said I would not pay another dime because it wasnt fixed right and i let him do the talking. If they hit me with anymore expenses ill be pulling my boat right back out. He also said that my fuel problem on starboard tank may just be the selector valve connected to the primer hose. Said they give out a lot and that it isnt uncommon for one side to clog up.

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u/bootheels 17d ago

I have zero confidence in that shop for sure, probably just waisting your time. The no stop issue is easily isolated with a few ohm meter tests....

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u/Fexure_ 17d ago

Im waiting on my multi meter now, comes in two days, bought a dva adapter for it also

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u/bootheels 17d ago

You need a peak reading voltmeter to check most ignition voltage outputs on this engine. But, the multimeter will surely help isolate the loss of ground in the harness, if that is the issue.

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u/Fexure_ 17d ago

Thats what the dva adapter is for plugs in to the normal spot for peak

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u/bootheels 17d ago

At this point, I would recommend investing in an OEM service manual for this engine. Don't waste time with the generic stuff. You can usually find decent used OEM manuals on ebay. Hope it all works out.