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UncleRobot | Staff 4.3K Views
Jul 30, 2026 4:27 PM

ANCEL SP20 Dual Port Spark Plug Tester for 12V Gas Engines $17.99 + Free Shipping w/ Prime

$18

$38

52% off
Amazon
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Deal Details
Toptool US via Amazon [amazon.com] has ANCEL SP20 Dual Port Spark Plug Tester for 12V Gas Engines on sale for $17.99. Shipping is free w/ Prime or on orders $35+.

Note: Not compatible with very short spark plugs. Check spark plug size before purchase.

Production Description from Store:
  • Model: ANCEL SP20
  • Compatible voltage: 12V gasoline engines
  • Max insulator diameter: 13mm
  • Power source: Corded electric
  • Compatible devices: Cars, motorcycles, ATVs, lawn mowers, generators, and other 12V gas engine equipment
  • Dual-socket design allows simultaneous testing of two spark plugs side by side
  • One-button operation — insert plugs, close cover, press button, observe spark
  • Clear transparent safety cover isolates high-voltage test area during use
  • Visually identifies weak, aging, or faulty spark plugs before replacing parts
  • No RPM adjustment or complicated setup required
Don't have Amazon Prime?
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Toptool US via Amazon [amazon.com] has ANCEL SP20 Dual Port Spark Plug Tester for 12V Gas Engines on sale for $17.99. Shipping is free w/ Prime or on orders $35+.

Note: Not compatible with very short spark plugs. Check spark plug size before purchase.

Production Description from Store:
  • Model: ANCEL SP20
  • Compatible voltage: 12V gasoline engines
  • Max insulator diameter: 13mm
  • Power source: Corded electric
  • Compatible devices: Cars, motorcycles, ATVs, lawn mowers, generators, and other 12V gas engine equipment
  • Dual-socket design allows simultaneous testing of two spark plugs side by side
  • One-button operation — insert plugs, close cover, press button, observe spark
  • Clear transparent safety cover isolates high-voltage test area during use
  • Visually identifies weak, aging, or faulty spark plugs before replacing parts
  • No RPM adjustment or complicated setup required
Don't have Amazon Prime?

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7 Comments

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Aug 4, 2026 11:46 PM
2.3K Comments
Joined Sep 2014
1-6Aug 4, 2026 11:46 PM
2.3K Comments
I didn't know this was a thing.
Aug 5, 2026 12:18 AM
314 Comments
Joined Jan 2016
MineNdesignAug 5, 2026 12:18 AM
314 Comments
Buy their $1100 3.3 star scanner and get this for free! Lol
Pro
Aug 5, 2026 12:40 AM
3K Comments
Joined Nov 2010
TACO_Trader
Pro
Aug 5, 2026 12:40 AM
3K Comments
Would be cool if you could just leave it on.
Pro
Aug 5, 2026 12:43 AM
3K Comments
Joined Nov 2010
TACO_Trader
Pro
Aug 5, 2026 12:43 AM
3K Comments
Two spark plugs. One for each side. /oo\
1
Aug 5, 2026 4:45 PM
107 Comments
Joined Jul 2018
LastDay13Aug 5, 2026 4:45 PM
107 Comments
if it has to come out... just change it? lol
Aug 6, 2026 3:30 PM
231 Comments
Joined Feb 2022
PurpleWealth332Aug 6, 2026 3:30 PM
231 Comments
I want it for the spark show lol
Aug 6, 2026 6:04 PM
1.4K Comments
Joined Sep 2022
TealIdea227Aug 6, 2026 6:04 PM
1.4K Comments
Quote from LastDay13 View quoted comment :
if it has to come out... just change it? lol
Back before iridium, I didn't bother with OEM-spec platinum plugs for inline-4s where you just opened the hood and they were all staring back at you ... and ironically, when NGK V-Powers were $1 apiece, you'd have to save 18 of them to pay for this.

I can see the point in trying to determine what the cause of some mystery issue was, instead of just changing parts.

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