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1984 60hp 3 cyl no spark at plugs

Discussion Forum at MarineEngine.com » Mercury Mariner Outboard » Archive through July 09, 2009 » 1984 60hp 3 cyl no spark at plugs « Previous Next »

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blake patton
New member
Username: nc190proof

Post Number: 2
Registered: 03-2009
Posted on Friday, July 03, 2009 - 07:32 pm:   Edit Post Delete Post View Post/Check IP

Father left me the boat in his will so I'm trying to fix on my own for sentimental reasons. I work with electronics and are slightly familiar with outboards. Just the basics.

1984 mariner 60hp 3cyl (have verrified model and make)

I took the boat out few months back and it started fine and took off but decided to stay near the local landing incase of failure as this was a season 1st run. And as soon as I did a u-turn it bogged down slowly crept along and then died. Has yet to start since then. It will turn and has plenty of power just absolutely no spark from wires. I've ran a few test with a test light and I can't seem to pinpoint the prob. Few local shops said it could be the stator, powerpack, or a kill switch? Even a bad ground. I'm unsure of the killswitch location. Any help would put me forever in your debt. Thanks guys
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Kirk Bawiec
Member
Username: smplsoft

Post Number: 18
Registered: 06-2009
Posted on Saturday, July 04, 2009 - 07:26 am:   Edit Post Delete Post View Post/Check IP

This is the run/stop switch or button. What you are looking for is a black wire with a yellow stripe or tracer connected to the swichbox (Power Pack). It would be the wire to the left of the blue wire at the top of your switchbox. This wire, when connected to ground (ei.. switch is closed) stops spark thereby cutting the motor off. To test it simply disconnect this wire at the power pack and then retest for spark.
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Kirk Bawiec
Member
Username: smplsoft

Post Number: 19
Registered: 06-2009
Posted on Saturday, July 04, 2009 - 07:47 am:   Edit Post Delete Post View Post/Check IP

Please Note: that removing this wire eliminates the stop function of the keyswitch so there is no way to shut the engine off if it starts. Disconnect all the spark plug wires and connect a spark tester from one of the wires to engine ground then check for spark.
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blake patton
New member
Username: nc190proof

Post Number: 3
Registered: 03-2009
Posted on Saturday, July 04, 2009 - 08:50 pm:   Edit Post Delete Post View Post/Check IP

Ok sounds good. Will try when I get home. If this works is the problem a bad power pack?
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Kirk Bawiec
Member
Username: smplsoft

Post Number: 25
Registered: 06-2009
Posted on Saturday, July 04, 2009 - 09:59 pm:   Edit Post Delete Post View Post/Check IP

No. This would simply indicate a problem in the ingition cutoff circuit. This would be the first test of a series of tests to determine your No Spark condition. Let me know how it goes and then we can take you further if needed.

Important Notice: Disconnecting this wire is for testing purposes only and you should never operate this engine on the water with it disconnected. It is a safety hazzard and I belive it is also illegal.
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blake patton
Member
Username: nc190proof

Post Number: 4
Registered: 03-2009
Posted on Sunday, July 05, 2009 - 12:58 am:   Edit Post Delete Post View Post/Check IP

Ok man will do. Ill post when I check it out. Thanks again.
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blake patton
Member
Username: nc190proof

Post Number: 5
Registered: 03-2009
Posted on Monday, July 06, 2009 - 08:23 am:   Edit Post Delete Post View Post/Check IP

Yep that did it. Disconnect the blk wire with yellow stripe and everything starts up fine. Had to choke to kill engine. When I re apply the wire to the switch box it starts now with key. Is the problem solved now or should I do something else?
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Kirk Bawiec
Member
Username: smplsoft

Post Number: 26
Registered: 06-2009
Posted on Monday, July 06, 2009 - 08:50 am:   Edit Post Delete Post View Post/Check IP

Well, it seems like you might have an intermittent problem with your ignition switch. However, when you origianlly tested for spark and found that you had no spark, was the engine cold? Did you test it right after it died on the water or off the water at a later time? Do you know the serial number of your engine?

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