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Magnetos, Ignition Coils and Spark Plugs Discussion about magnetos, buzz coils, spark plugs, ignitors and low tension coils.

Magnetos, Ignition Coils and Spark Plugs

In line spark tester


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  #1  
Old 09-12-2015, 10:37:53 AM
pjhoward pjhoward is offline
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Default In line spark tester

Hi. I'm thinking of buying an in line spark tester. Do any of you have any recommendations?
Thanks.
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Old 09-12-2015, 12:31:58 PM
andrewmackeyjr andrewmackeyjr is offline
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Exclamation Re: In line spark tester

NAPA sells an inline, costs about 10 bucks. A good auto supply will probably have one as well. JC Whitney has replacement ends for ignition wires that have a neon bulb in them - pricey but neat to look at. if your engine has a 14mm based plug - look up an AC LM 46-B.
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Old 09-12-2015, 05:54:59 PM
mmcdonald mmcdonald is offline
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Default Re: In line spark tester

I'd recommend an adjustable air gap type and not a bulb type. Yes the bulb type will tell you if the ignition is signaling a spark but it doesn't really give you an indication of the spark intensity/voltage/etc. It is safer than an open air arc if working close to explosive items but just because the bulb lights does not mean it is enough spark to fire the plug. Just my 2 cents.
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Old 09-12-2015, 06:21:03 PM
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Motormowers Motormowers is offline
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Default Re: In line spark tester

I use the Stens 752-329 spark testers with great success. The neon bulb should light bright when an engine is pulled over or running and its easier to see outside than a jump spark tester. If its anything but bright or nothing at all you know you have a weak/dead coil. Its a nice cheap tester. Only issue Ive run into is when running an engine full throttle for a long period to see if a coil will act up when hot is the red boot melted a little from the plug heat plus outside summer temps. For the price it cant be beat, I get a few years use from them at work before the bulb glass turns blackish then I toss them and get another pair.
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Old 09-12-2015, 07:34:50 PM
gdstew gdstew is offline
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Default Re: In line spark tester

B & S 19368, from any dealer. I don't know the price without going to the shop. The neon testers will trick you into thinking you have good spark IMO.
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Old 09-13-2015, 07:55:06 AM
pjhoward pjhoward is offline
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Default Re: In line spark tester

Thanks for your input. I was concerned the tester might be worthless. I'm going to go with the B&S 19368.
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Old 09-21-2015, 04:29:36 PM
Geochurchi Geochurchi is offline
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Default Re: In line spark tester

Quote:
Originally Posted by pjhoward View Post
Thanks for your input. I was concerned the tester might be worthless. I'm going to go with the B&S 19368.
Check on Ebay
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Old 09-22-2015, 12:03:08 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: In line spark tester

The neon testers will tell you if you have erratic voltage, by the brightness if the bulb. Great for testing the model 19 and 23 briggs, whil make you think it has a bad carb, when in fact it is a bad coil. In daylight, are easier to see than a jump gap type, and not so hard on the coil either. For most newer engines, a 1/4" spark is a minimum to fire the lean burn engine fuel/air mix. For older points mag engines, like the letter series, about 3/16 is as far as you want to go
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