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How to check a coil and condenser?

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Old 09-08-2009, 05:33:48 PM
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Gene Fisher Gene Fisher is offline
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Default How to check a coil and condenser?

On a small Lauson four stroke engine i need to know how to check the coil and condenser to see if they are working. I have intermittent spark and the engine will not run.
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Old 09-08-2009, 06:00:37 PM
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Elden DuRand Elden DuRand is offline
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Default Re: How to check a coil and condenser?


You can check the mag coils and condensers on small engines by doing the following.

Put an insulator between the points to hold them open. This is important.

Now, set-up a spark gap then hook the negative terminal of a 6 or 12 volt battery to the engine frame. Hook a wire to the positive battery terminal and quickly flick it across the wire that goes between the coil and the points.

You should get a big, fat spark at the plug wire every time you do it.

CAUTION! Do NOT leave the battery hooked up! Within seconds the coil will go up in smoke. Just a quick flick of the battery wire will do.

Take care - Elden
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Old 09-08-2009, 07:58:36 PM
grub54891 grub54891 is offline
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Default Re: How to check a coil and condenser?

Just grab the plugwire and crank it over,You will find out real quick if it's firing!!
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Old 09-08-2009, 10:24:42 PM
GarysToys GarysToys is offline
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Default Re: How to check a coil and condenser?


You sound like my twin brother giving advice like that. Ouch!!!

We were fishing in Canada with a 17 year old neighbor kid in the boat with us.
The kid said he had to pee. My brother had a plastic gallon jug with the bottom cut off to bail water out of the boat. He told the kid to stand up and pee into the jug. When the kid was finished he ask my brother what to do with the jug. You guessed it, he told him to unscrew the cap. Here we were out in the middle of a lake with 2000 miles of shoreline and guess what the kid did.

He unscrewed the cap and emptied the bottle all over his hands and the bottom of the boat.

He did use this as a learning moment and did not listem to my brother for the rest of the trip.
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