Because Owning And Flying Your Beechcraft Can Be Done Safely AND For Less Money!
  CSOB Spark Plug Resistance Tester - "Spark-On PRO"

 

 

SORRY, THIS PRODUCT IS NO LONGER AVAILABLE

 

 

For a long while the piston engine industry has known that spark plug resistance is critical to good ignition system performance. Recently, information has been widely circulated to suggest that 5,000 ohms is the top end of acceptability for our piston engine spark plugs. High resistance values in spark plugs will make the magnetos work much harder than plugs that are under the 5,000 ohm level. Out of spec plugs contribute to hard starting and in general they foul the combustion event inside your cylinders.

 

Check out this narrative on spark plug resistance HERE

 

Read what Tempest has to say about spark plug resistance testing HERE

 

There are several spark plug testers on the market that sell on the order of >$100. CSOBeech is pleased to introduce you to this low cost plug tester find created by Foster Flight. This solution is available from CSOBeech.com for $55.95 (including US Shipping, International Shipping available).

 

Get Your "Spark-On PRO" Now with Digital Display Readout

 

 

 

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No more fumbling with the test leads of your volt/ohm meter!

 

  • Self-contained tester, small toolbox footprint.

 

  • Tests all 14mm – 18mm shielded plugs.

 

  • Tests Massive & Fine Wire plugs

 

  • Uses 12V user-replaceable A23 battery and a precision current injector to push 1 milliamp through the plug resistorr

 

  • Checks high limit (more than about 5,000 Ohms) and low limit (less than about 500 Ohms).

 

  • Triple redundant go/no go indicators: A good test yields Green light on, Red light off and a tone.

 

 

Thus the display accurately indicates plug resistance in K-Ohms. If the plug is open or not present (simulated by pushing your finger in) it will indicate around 10K Ohms (10 volts minus the loss across the current injector).

 

Remove the cap and replace the A23 battery if this ‘finger test’ indicates less than 8.00K Ohms. A spare battery is included. A chart is printed on the tool indicating acceptable resistance ranges.

 

PS: Per the FAA FARs, removing, cleaning and replacing your spark plugs is allowable owner maintenance. Check out the complete list of 31 owner maintenance items HERE, spark plugs is item #20. 

 

Support CSOBeech.com with your purchase. Use the "Buy it Now" Button Below to Order One for $55.95 (including FREE USPS Priority Mail shipping w/tracking). Buy a second one as a gift for your A&P/IA!

 

Simply insert the plug, top barrel end first, put the cap on, compress and activate the momentary switch. Red light =  <500 ohms or >5000 ohms = BAD. Green light + Beep Tone = <5000 ohms, >500 Ohms = GOOD!

 


 

Below is a demo video on how to use Spark-On

 

 


 

 

Or you can use the below image from www.tempestplus.com to measure your resistance with your volt/ohm meter and its probes.

 

 

See the Spark-On User Manual HERE

See the Spark-On User Press release HERE

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Need BG-341 Spark Plugs? - Limited Quantities Available

 

 

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