50 mercury wont start ??

Joined
Dec 25, 2008
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2
1985 mercury 50 4 cyl, 2 stroke ran fine 2 weeks ago . went today and wouldnt start. smells flooded ? plugs where wet hen pulled( NGK, funny looking with flush electrode) doesnt seem to be firing ?? cant see any spark ?? should i be able to see spark ?? can i cross the wires to see if it trys to backfire ???
 

Laddies

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Sep 10, 2004
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12,218
Re: 50 mercury wont start ??

You should see spark on a surface gap plug, first check the tether switch and make sure it is on, next disconnect the black/yellow kill wire at the switch box and check each time for spark if none get back and we can give you the test for the ign. system.
 

tashasdaddy

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Nov 11, 2005
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51,019
Re: 50 mercury wont start ??

use a proper spark tester makes it much easier.
 
Joined
Dec 25, 2008
Messages
2
Re: 50 mercury wont start ??

the bulb pumps up good and firm. checked the lanyard and kill switch,their correct. checked plug spark with ohm meter and test light....... nothing. even crossed # 1 and 2 wires and tryed . no backfire or nothing. engine is spinning plenty fast. theres a black and yellow wire close to the starter thats hooked to a little condenser looking thing then to ground. disconnected this ....... nothing ??
 

Laddies

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12,218
Re: 50 mercury wont start ??

Here the ign. system test from CDI.
scan0003.jpg
 
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