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70 Johnson problem
I am trying to get some ideas for my buddys 70 Johnson. It is a 96 model and is cutting off when up to speed. It runs great and doesnt hesitate a bit till you get up and oing good and then it just dies. Instantly. There is no hesitaion or bogging down or anything. It will crank back up and run great again for a minute till it does the same thing again.
What yall think? Sounds electrical to me...maybe a faulty kill switch? It has one of those kill switches built into the ignition and it doesnt work when u pull the clip so I installed a separate one. We left the clip in the old one just in case it decided to start working again.
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Really, who ISNT better looking than Charlie? 
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#2
08-14-2006, 11:52 AM
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Re: 70 Johnson problem
Fuel pump maybe? Does the ball stay primed?
I don't know what else would cause it.
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 1994 Wellcraft V21
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#3
08-14-2006, 12:01 PM
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Re: 70 Johnson problem
Fuel bulb stayed firm. We checked that.
Do you think it could be the pump though and just start right back up and run fine again?
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Really, who ISNT better looking than Charlie?
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#5
08-14-2006, 12:34 PM
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Re: 70 Johnson problem
I guess so, but there again I just dont feel like its a fuel problem because it starts right back up. ???
I could be wrong though, Ive been wrong before..when I thought Willy was straight. ::)
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Really, who ISNT better looking than Charlie?
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#6
08-14-2006, 12:46 PM
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Re: 70 Johnson problem
WHEN MY I/O HAD PROBLEMS, IT WOULD RUN GREAT FOR A MINUTE THEN DIE, SOUNDS LIKE WHAT YOUR BUDDYS IS DOING.
THE PROBLEM WITH MINE WAS THE TIMING WAS SET WRONG.
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 CY 1984 V20 STEP LIFT I/O 470 MERCRUISER Wheeling, WV
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#7
08-14-2006, 01:32 PM
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Re: 70 Johnson problem
An obstruction can cause your primer bulb to collapse (suck in).
I don't know if that's your problem, I'm thinking not, but probably would be simple enough to run it on a separate fuel line and portable tank to eliminate the possiblity of an obstruction. Other than that, and the fuel pump, I would have to consult the experts on this site. Skools could probably help as he is a "Johnson" man. ;)
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1994 Wellcraft V21
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#8
08-14-2006, 01:35 PM
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Re: 70 Johnson problem
I think we will run it separate just to eliminate the fuel thing.
Willy is a "Johnson man" too, but thats another story. ::)
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Really, who ISNT better looking than Charlie?
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#9
08-14-2006, 02:02 PM
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Re: 70 Johnson problem
Powerpack...
Airslot
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Airslot Airslot's V-20 Gallery
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#10
08-14-2006, 03:43 PM
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Re: 70 Johnson problem
No, not the "P" word!!! :o
__________________
Really, who ISNT better looking than Charlie?
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