AUTOOL SPT301Trehulls digital tennpluggtester
US$59.00
- Three-Plug Comparison
- 200–9000 RPM Setting
- Digital RPM Display
- Adjustable Plug Height
- Three-Plug Comparison: Test one reference plug with two test plugs for side-by-side visual comparison.
- 200–9000 RPM Setting: Adjust the simulated firing rate from 200 to 9000 rpm.
- Digital RPM Display: Read the simulated speed on the backlit LCD while setting the comparison condition.
- Adjustable Plug Height: Adjust the test-hole height for compatible longer spark-plug ends.
- Visible Protective Cover: Observe spark behavior through the transparent cover while reducing direct exposure.
- Three-Plug Comparison: Test one reference plug with two test plugs for side-by-side visual comparison.
- 200–9000 RPM Setting: Adjust the simulated firing rate from 200 to 9000 rpm.
- Digital RPM Display: Read the simulated speed on the backlit LCD while setting the comparison condition.
- Adjustable Plug Height: Adjust the test-hole height for compatible longer spark-plug ends.
- Visible Protective Cover: Observe spark behavior through the transparent cover while reducing direct exposure.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL SPT301 · Three-Position Spark Plug Tester
Compare Two Plugs Against a Reference
Compare two test spark plugs against a known reference plug at the same bench setting. SPT301 provides three positions, an adjustable 200–9000 rpm simulated rate, and a backlit digital speed display. Adjustable socket height accommodates compatible longer plug ends, while the transparent cover keeps all firing positions visible.
- 1 Reference + 2 Test Plugs
- 200–9000 rpm Bench Setting
- Digital Speed Display
- Height-Adjustable Plug Sockets
- 110 V / 220 V Input
Key Features
Three Spark Plug Positions with Digital Speed Control
1 Reference + 2 Test Plugs
Test one standard or new spark plug together with two test spark plugs for a more straightforward visual comparison of spark strength and performance.
200-9000 RPM Simulation
Adjust the bench firing-rate setting from 200 to 9000 rpm and compare the reference and test plugs at the same displayed setting. Treat the result as a relative in-air observation, not proof of spark performance under cylinder pressure or load.
Three-Hole Design
The three-hole layout supports simultaneous comparison of three spark plug positions, making it suitable for efficient 12V automotive spark plug checks.
Adjustable Test Hole Height
The adjustable test hole height helps support longer spark plug ends and improves compatibility for models that use longer plug structures.
Digital RPM Display
The LCD digital backlit display clearly shows the simulated RPM, helping users control test conditions with better visibility.
Transparent Safety Cover
The protective cover lets users observe spark behavior while reducing direct spark exposure during operation.
Accessible Test Controls
The test holes, transparent cover, digital display and buttons are grouped together for spark plug comparison.
External Adapter Power
SPT301 uses AC 110V / 220V input power and DC12V output. Confirm local power compatibility before use.
Body Size and Weight
Body dimensions: 200 × 118 × 118 mm. Product weight: 500 g.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Install a Reference and Compare Under Cover
Place The Spark Plugs
Insert the standard spark plug into the standard test hole, then insert the spark plugs to be tested into the test holes.
Close The Protective Cover
Cover the protective cover before testing to reduce direct spark exposure and improve safety during observation.
Connect Power And Start
Plug the power adapter into the side power interface, connect the power supply, and turn on the power switch.
Adjust RPM And Observe
Use the “+” and “-” buttons to adjust the working frequency, then observe the spark plug test status through the protective cover.
Safe Use
Treat the Bench Spark as a Relative Check
Power Off Before Installing Plugs
Do not insert or remove spark plugs while the power supply is connected. Turn off the tester before installing, removing, or repositioning spark plugs.
Close The Safety Cover
Close the transparent protective cover before testing. It helps reduce direct exposure to sparks during visual observation.
Do Not Touch During Operation
When the spark plug is running, the voltage can reach tens of thousands of volts. Do not touch the spark plug directly with bare hands.
Use Correct Input Power
Use AC 110V / 220V ±10% input power as specified for the SPT301 spark plug tester.
Use For Suitable Spark Plugs
SPT301 is suitable for common 12V automotive spark plug testing and motorcycle spark plug checks. Confirm size and fitment before testing unusual plug types.
Store In A Dry Place
When not in use, store the tester in a dry, ventilated place. Avoid hot, humid, non-ventilated areas and contact with corrosive liquids.
Compare Bench Results
Compare spark behavior across plugs, then confirm suspected ignition faults on the vehicle.
Inspect Before Operation
Tighten loose parts before operation and avoid rubbing the housing against rough surfaces. Do not overload the equipment; keep the safety guard complete and reliable. Stop use if wiring is aging or damaged.
Model Comparison
Choose the Right Spark Plug Tester
Model Guide
Choose one or more models. SPT301 is selected by default.
| Product Name | SPT101 | SPT105 | SPT301 | SPT360 |
|---|---|---|---|---|
| Test Setup & Capacity | ||||
| Adjustable Hole Position Height | × | ✓ | ✓ | ✓ |
| Working Principle | Digital Sensing | Digital Sensing | Digital Sensing | Digital Sensing |
| Simulated RPM | 0-6000rpm | Page: 0–6000 rpm; manual operation: 1000–6000 rpm/min (confirm delivered version) | 200-9000rpm | 200–9000 rpm |
| Test Hole Position | 2 | 2 | 3 | 5 |
| Air-Bench Spark Observation | ✓ | ✓ | ✓ | ✓ |
| Adjustable Bench Firing Rate | ✓ | ✓ | ✓ | ✓ |
| Supports Testing of Long Spark Plugs | × | ✓ | ✓ | ✓ |
| Power & Operating Conditions | ||||
| Input Voltage | 110V/220V | 110V/220V | 110V/220V | 110V/220V |
| Ambient Temperature | 0-45℃ | 0-45℃ | 0-45℃ | 0-45℃ |
| Safety & Display | ||||
| Safety Protection Cover | ✓ | ✓ | ✓ | ✓ |
| LCD Digital Backlit Screen | × | × | ✓ | ✓ |
Manual & Support
Find the Manual and Setup Guidance
AUTOOL SPT301 User Manual
Open the PDF manual for AUTOOL SPT301 three-hole spark-plug comparison, test-height and speed adjustment, digital RPM reading, protective-cover use, safety and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL SPT301 spark plug tester
- Power AdapterIncluded power adapter
- DocumentationAUTOOL SPT301 user manual
- Retail BoxAUTOOL SPT301 packaging box
- TilbehørAccessories follow the listed package configuration.
Buyer Questions
Spark Plug Fit and Comparison Questions
What Spark Plugs Can SPT301 Test?
SPT301 is designed for common 12V automotive spark plug testing and motorcycle spark plug checks. It supports long spark plug testing and adjustable test hole height, but users should confirm fitment before testing unusual plug sizes or special structures.
How Many Spark Plugs Can It Test At The Same Time?
SPT301 has three test positions. It can compare one standard or new spark plug with two spark plugs to be tested, helping users observe spark strength and performance differences more directly.
Can The Simulated RPM Be Adjusted?
Yes. Use the “+” and “-” buttons to adjust the working frequency. SPT301 supports 200-9000 RPM simulation, and the digital display shows the simulated RPM during testing.
What Power Supply Does SPT301 Use?
SPT301 uses AC 110 V / 220 V ±10% input power and DC 12 V output. Use the supplied power adapter and confirm local power compatibility before use.
Do I Need To Close The Protective Cover Before Testing?
Yes. Close the protective cover before testing. The tester generates high-voltage sparks during operation, so do not touch the spark plug directly and do not insert or remove spark plugs while the power supply is connected.
What Is The Difference Between SPT301 And SPT360?
SPT301 has three test hole positions and supports 200-9000 RPM, LCD digital backlit display, adjustable hole position height, and long spark plug testing. SPT360 has five test hole positions for users who need more comparison capacity.
What Is Included In The Package?
Package contents: SPT301 main unit, retail box, user manual, and power adapter. Spark plugs shown in feature images are demonstration items and are not included.
How Long Is The Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Chuluun ✓ Verified Purchase –
AUTOOL SPT301 Car Spark Tester Automotive Diagnostic
AUTOOL SPT301 Car Spark Tester Automotive Diagnostic
Henry Penn ✓ Verified Purchase –
I bought this product for my own car and it was very easy to perform the test…
I bought this product for my own car and it was very easy to perform the test myself. This is very useful and I really like this product.
Stipe Loncar ✓ Verified Purchase –
Spt301
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