DYI Spark Tester - less than $1.00

rjswenson

rjswenson

Cadet
Joined
Jul 19, 2013
Messages
10
Hardware items:
1. 1 ft - 5/16in Vinyl tubing.
2. 2 ea. - 10-24 screws about 3 in long.
3. 1 ea - 1/4-20 screw
3. Ring terminals for wire
See the image for the setup.

Jam the 1/4 screw into the spark plug boot.
Adjust the gap between the screws in the vinyl tubing to the distance you want.
Ground the other wire (alligator click).
Pull the starter rope and observe the spark.

Works great.

Note: may have to modify the screw and/or vinyl tubing dimensions to match your specific needs or material availability.
 

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kodibass

Master Chief Petty Officer
Joined
Apr 10, 2010
Messages
864
Re: DYI Spark Tester - less than $1.00

adjustable also' nice
 
B

bonzoscott

Senior Chief Petty Officer
Joined
Jul 26, 2008
Messages
745
Re: DYI Spark Tester - less than $1.00

That is Cool! I might add - grind ends of screws to a point.
 
K

keefallan

Petty Officer 1st Class
Joined
Jun 23, 2010
Messages
219
Re: DYI Spark Tester - less than $1.00

I agree with bonzoscott. Grind it to a point. I've got one of those expensive CDI 8 cyl at a time testers. I don't see how this won't work just as good as it does. Fantastic!!!! I wish I'd come up with this! It would have saved me 100 bucks. My only recommendation is to make that 1/4-20 bolt only as long as necessary.
 
kfa4303

kfa4303

Banned
Joined
Sep 17, 2010
Messages
6,094
Re: DYI Spark Tester - less than $1.00

Cool gizmo. I love anything DIY too!
 
B

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: DYI Spark Tester - less than $1.00

I'm lazy. I bought an adjustable one at a parts house for $6.50.
 
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