Spark checker/CD module grounding rig

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Just thought I'd throw this out there. Checking the ignition systems on these Force motors (actually, any outboard) is somewhat cumbersome at times. Holding the spark plug wire against the block to check for spark can be a shocking experience LOL. Grounding the CD modules when cranking to prevent possible damage etc.

Came up with a simple cheap rig to accomplish the task to minimize danger to CD modules and mechanic. Some of you folks probably already have a method. This is just another way that I thought I'd share. Cost me about $12.

It consists of a 1 1/4in wide, 1/4in thick piece of scrap metal bar about 8 inches long. Also available at Home Depot or Lowes. Wood gluing clamp (Home Depot $1.89). Battery clamp (NAPA $1.59). 14mm spark plug tap (NAPA $6.89). Piece of 10 gauge stranded wire.

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Drill and tap four holes in the metal bar ( I have a 4 cylinder motor). Attach the 10 gauge wire to the metal bar and solder the battery clamp on the other end. Bolt the wood gluing clamp to the metal bar. To use, attach the battery clamp to an unpainted surface on the block. Install the spark plugs into the metal bar. Attach spark plug wires. Mount the rig someplace convenient with the wood gluing clamp. I use a remote starter switch on the starter solenoid ( connect to battery cable and yellow wire on solenoid). Turn ignition key to the "ON" position and press the button on the remote starter switch. Also works great to set timing.
 

GrindKore

Petty Officer 1st Class
Joined
Jun 20, 2008
Messages
211
Re: Spark checker/CD module grounding rig

This is great idea, thank you for sharing.
 

john from md

Commander
Joined
Apr 13, 2008
Messages
2,184
Re: Spark checker/CD module grounding rig

Good to see that American ingenuity in action! Well done! :D

Frank A. would be proud. (I think) :eek: :rolleyes:


John
 

chitownborn

Petty Officer 2nd Class
Joined
Jul 13, 2007
Messages
178
Re: Spark checker/CD module grounding rig

ditto, awesome invention!!
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Spark checker/CD module grounding rig

Right now, I use a piece of #12-2 Romex ground wire. I just wrap it a couple-three times around each plug, then bend the free end and stick it in a plug hole. Works, and if I lose it, I quickly make another. (Common occurence around my garage--I have a black hole into which tools and parts regularly fall. Thus, my 10 minute jobs are usually 2 hours long with the search function engaged.)

However, I like your tester and will probably make one for myself so I can lose it just when I need it and go back to my wire.
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: Spark checker/CD module grounding rig

I know what you mean with the wire method Frank. I used that many times. Seems like when I make up some wires to jumper the wires or plugs, I put them aside only never to find them again. Have to make a set up all over again. With this rig, I just clamp it to the side of my tool box or work bench.

One additional benefit is that you can really get a good clear comparison between the spark on each plug/cylinder when cranking.
 
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