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AUTOOL SPT301 Car Spark Tester Automotive Diagnostic
US$59.00
Key Features
- Three-Hole Test
- RPM Simulation
- Digital RPM View
- Three-Hole Test: The design supports testing two spark plugs plus one new plug for side-by-side comparison.
- RPM Simulation: Simulated engine-speed testing up to 9000 rpm helps reveal spark behavior under more realistic conditions.
- Digital RPM View: The digital screen shows simulated RPM so adjustments and comparisons are easier to track.
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AUTOOL SPT301
Product Overview
The AUTOOL SPT301 car spark tester is designed to test spark plug performance and spark strength under simulated engine working conditions. It supports three-hole comparative testing, 200-9000 RPM adjustment, a digital RPM display, and a transparent safety cover for safer visual inspection of common crankshaft-engine and motorcycle spark plugs.
Three-Hole Testing 200-9000 RPM Digital Display Safety Cover
AC 110V / 220VInput Power
3Test Holes
9000 RPMMax Simulation
3 YearsMain Unit Warranty
Click to enlargeBefore You Order And Use
Before You Order And Use
SPT301 is a high-frequency spark plug tester. Read the power, protective cover, high-voltage, and maintenance notes before inserting spark plugs or starting a test.
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.
Maintenance Reminder
- Regularly check parts that need to be tightened or connected. Tighten loose parts before operation.
- Avoid rubbing the housing against rough surfaces to reduce wear.
- Do not overload the equipment, and make sure the safety guard remains complete and reliable.
- If wiring shows aging or damage, stop use and contact support before continuing.
Key Features
Key Features
SPT301 combines three-hole comparison, adjustable simulated RPM, digital display control, long spark plug support, and a safety cover to make spark plug condition checks faster and easier to observe.
Comparative Testing
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
Simulate spark plug operating status during engine function with adjustable RPM. A higher simulated frequency shows stronger spark intensity during testing.
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.
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Click to enlargeSpecifications
AUTOOL SPT301 Product Specifications
SPT301 uses AC 110V / 220V input power, DC12V output, 200-9000 RPM simulated speed, and a compact 200 × 118 × 118mm body with a 500g product weight.
| Core Specifications | |
| Product | AUTOOL SPT301 Car Spark Plug Tester |
| Working Principle | Digital sensing |
| Input Power | AC 110V / 220V ±10% |
| Output Power | DC12V ±2 1A |
| Simulated RPM | 200-9000 RPM |
| Ambient Temperature | 0°C-45°C |
| Relative Humidity | <85% |
| Product Dimensions | 200 × 118 × 118mm |
| Product Weight | 500g |
| Testing And Display | |
| Test Hole Positions | 3 |
| Adjustable Hole Position Height | Supported |
| Working Condition Simulation | Supported |
| Adjustable Simulated RPM | Supported |
| LCD Digital Backlit Screen | Supported |
| Long Spark Plug Testing | Supported |
| Safety Protection Cover | Supported |
| Product Structure | |
| Standard Test Hole | Reference plug position for comparison |
| Test Holes | Two test plug positions |
| Controls | RPM “+”, RPM “-”, and power switch |
| Interface | Display screen and power port |
Click to enlargeCore Specifications
Input PowerAC 110V / 220V ±10%
Output PowerDC12V ±2 1A
Simulated RPM200-9000 RPM
Ambient Temperature0°C-45°C
Relative Humidity<85%
Dimensions200 × 118 × 118mm
Weight500g
Testing Features
Test Holes3
Adjustable Hole HeightSupported
LCD Backlit ScreenSupported
Long Spark Plug SupportSupported
Safety CoverSupported
How To Use
How To Use
Install the spark plugs, close the protective cover, connect power, adjust the simulated RPM, and observe the spark plug test status through the transparent 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.
Use Notes
- Turn off the power before inserting, removing, or adjusting spark plugs.
- Do not touch the spark plug directly during operation.
- The higher the working frequency, the stronger the displayed spark plug intensity during testing.
- If the spark plug is unusually long or has an uncommon structure, confirm the fit before testing.
Product Comparison
Product Comparison
Compare SPT301 with SPT101, SPT105, and SPT360 before choosing the right hole count, RPM range, digital display, long spark plug support, and comparison capacity.
SPT101Entry dual-hole model with 0-6000 RPM, safety cover, adjustable simulated RPM, and no LCD digital backlit screen or long spark plug support.
SPT105Dual-hole model with 0-6000 RPM, adjustable hole position height, safety cover, adjustable simulated RPM, and long spark plug support.
SPT301Three-hole model with 200-9000 RPM, adjustable hole position height, safety cover, LCD digital backlit screen, and long spark plug support.
SPT360Five-hole model with 200-9000 RPM, LCD digital backlit screen, and higher comparison capacity for users who need more test positions.
Decision CheckChoose by test hole count, RPM range, adjustable height, digital display, long spark plug compatibility, and workshop testing volume.
Click to enlargeRelated Products
Related Products
Compare related AUTOOL spark plug tester models before choosing the right test-hole count, RPM range, LCD display, adjustable hole height, and long spark plug compatibility.
- Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL SPT101 Spark Plug Tester Spark Plug Checker
From US$40.00 - Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL SPT105 Spark Plug Tester Tool Adjustable Spark Tester
From US$33.00 - Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL SPT301 Car Spark Tester Automotive Diagnostic
From US$59.00 - Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL SPT360 Spark Plug Tester Automotive Diagnostic
From US$59.00
Related Guides
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July 9, 2021
When the car has any symptoms, it means that the spark plug should be replaced?
Use common misfire and performance symptoms as a quick reference when deciding whether to verify plugs with a spark tester.
October 23, 2024
Car Maintenance Guide: Everything You Need To Know
Review routine maintenance context around ignition health, replacement timing, and workshop inspection habits before spark plug diagnosis.
Manual And Downloads
Manual And Downloads
Download the SPT301 manual for safety cautions, product structure, specifications, operating instructions, maintenance guidance, warranty access, and return or exchange information.
Click to enlargeAUTOOL SPT301 Manual PDF
Open the manual for SPT301 setup, warnings, operation, maintenance, and warranty details.
Download ManualNeed Setup Confirmation?
Contact AUTOOL Store if you need to confirm input power, spark plug fitment, SPT101 / SPT105 / SPT301 / SPT360 model selection, safety cover use, or package contents before ordering.
Click to enlargeWhat Is In The Box
What Is In The Box
The package image shows the SPT301 main unit, retail box, user manual, and power adapter. Spark plugs shown in function images are for testing demonstration and are not listed as included accessories.
Main UnitAUTOOL SPT301 spark plug tester
Power AdapterIncluded power adapter shown in the package image
DocumentationAUTOOL SPT301 user manual
Retail BoxAUTOOL SPT301 packaging box
AccessoriesRefer to the official package image for final included accessories
Questions And Answers
These answers cover spark plug compatibility, three-hole comparison, RPM adjustment, power input, safety cover use, model selection, package contents, and warranty support.
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.
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.
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.
SPT301 uses AC 110V / 220V ±10% input power and DC12V output. Use the included power adapter shown in the package image and confirm local power compatibility before use.
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.
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.
The package image shows the SPT301 main unit, retail box, user manual, and power adapter. Refer to the official packing list image for the final package contents. Spark plugs shown in feature images are demonstration items and are not listed as included accessories.
AUTOOL provides a three-year warranty for the main unit, and included accessories are covered by a one-year warranty according to the manual. Warranty service applies to eligible non-human damage cases and depends on the actual breakdown situation.
Warranty And Contact
Warranty And Contact
For SPT301 setup, power input confirmation, spark plug compatibility, safety cover use, package contents, manual support, warranty service, or SPT101 / SPT105 / SPT301 / SPT360 model selection, contact AUTOOL Store directly.
Pre-Sales And Product Support
Use support if you need help confirming whether SPT301 is the right three-hole spark plug tester for your vehicle, workshop workflow, input power environment, or comparison testing needs.
- SPT301 setup and safe-use confirmation
- AC 110V / 220V power input questions
- Common spark plug and long spark plug fitment support
- SPT101 / SPT105 / SPT301 / SPT360 model selection
- Packing list and accessory confirmation
- Main unit warranty and accessory warranty support
Customer Reviews
Leave A Review
john valadao (verified owner) –
Great product. AAA++
Does exactly what I need it to do. I can now test my spark plugs after each run on the track and see which ones are not firing correctly.
Kerwin Malan (verified owner) –
GOOD
I really like AUTOOL products, SPT301 is very helpful, I always have problems with the power of my car, checking it with SPT301 revealed that it was a spark plug firing problem, fantastic, solved my big problem!
L****i (verified owner) –
good quality and excellent product I give it 5 stars
good quality and excellent product I give it 5 stars