AUTOOL SPT105 Adjustable Dual-Hole Spark Plug Tester
US$33.00
- Dual-Plug Comparison
- Up to 6000 RPM
- Adjustable Hole Height
- 110 V / 220 V Choice
- Dual-Plug Comparison: Compare two spark plugs at the same adjustable air-bench firing setting.
- Up to 6000 RPM: Adjust the simulated firing rate up to 6000 rpm.
- Adjustable Hole Height: Raise or lower the test sockets to accommodate some longer spark-plug ends.
- 110 V / 220 V Choice: Select the correct 110 V or 220 V input version before ordering.
- Transparent Safety Cover: Watch comparative firing continuity through the closed transparent cover.
- Dual-Plug Comparison: Compare two spark plugs at the same adjustable air-bench firing setting.
- Up to 6000 RPM: Adjust the simulated firing rate up to 6000 rpm.
- Adjustable Hole Height: Raise or lower the test sockets to accommodate some longer spark-plug ends.
- 110 V / 220 V Choice: Select the correct 110 V or 220 V input version before ordering.
- Transparent Safety Cover: Watch comparative firing continuity through the closed transparent cover.
- 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 SPT105 · Height-Adjustable Dual Spark Plug Tester
Compare Longer Spark Plugs Side by Side
Compare two spark plugs at the same adjustable bench setting, including compatible plugs with longer terminal ends. SPT105 raises or lowers the socket height, keeps visible firing behavior behind a transparent cover, and supports simulated rates up to 6000 rpm. Choose the correct 110 V or 220 V version for the workshop supply.
- 2-Plug Side-by-Side Test
- Height-Adjustable Plug Sockets
- Transparent Protective Cover
- 110 V / 220 V Versions
- Rotary Bench-Speed Control
Key Features
Adjustable Height with Dual Firing Positions
Two-Plug Side-by-Side Comparison
Test two spark plugs at the same time to compare spark status more quickly during basic 12V vehicle spark plug checks.
Adjustable Test Hole Height
The adjustable height design improves compatibility with longer spark plug ends used by BMW, Volkswagen, Audi, and other models.
0-6000rpm Simulation
Adjust the simulated engine working speed from a page-stated 0–6000 rpm range; the current manual procedure states 1000–6000 rpm/min, so confirm the delivered version to observe spark plug performance under different test conditions.
Visual Spark Observation
The tester helps users visually check ignition strength, spark continuity, and comparative working status through the transparent cover.
Protective Safety Cover
Close the protective cover before testing to reduce direct exposure to sparks and improve operational safety.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Confirm Fit, Set Height and Compare
Place Spark Plug
Place the spark plug securely into the test hole. Use the adjustable test height when testing longer spark plug ends.
Close Safety Cover
Close the transparent protective cover before starting the test to reduce direct spark exposure.
Connect Power And Adjust RPM
Connect the correct 110V / 220V power supply option, then adjust the working frequency or simulated RPM with the control knob.
Observe And Compare Spark Status
Observe the spark plug test status through the protective cover and compare performance if two plugs are tested together.
Safe Use
Resolve the Speed Range by Delivered Version
Close Cover Before Testing
Always close the transparent protective cover before testing to reduce direct spark exposure.
Spark Plug Test Scope
SPT105 is intended for spark plug testing and comparison. It is not a full ignition system diagnostic tool.
Confirm Input Voltage
Confirm the correct 110V / 220V input option before ordering or connecting power.
Compare the Spark Results
Compare both removed spark plugs in air under the same setting, then confirm any suspected ignition fault with the vehicle procedure.
Model Comparison
Choose the Right Spark Plug Tester
Model Guide
Choose one or more models. SPT105 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 SPT105 User Manual
Open the PDF manual for AUTOOL SPT105 dual-hole spark-plug comparison, test-height adjustment, speed simulation, visual result assessment, protective-cover use, safety and troubleshooting support.
Package Contents
See What Comes in the Box
- Order ScopeConfirm the exact included items for the selected package before ordering.
Buyer Questions
Spark Plug Fit and Comparison Questions
How Do I Use AUTOOL SPT105?
Place the spark plug in the test hole, close the protective cover, connect the correct power supply, adjust the working frequency, and observe the spark plug status through the transparent cover.
Can SPT105 Test Two Spark Plugs At The Same Time?
Yes. SPT105 has a dual-hole design and can test two spark plugs simultaneously, which helps users compare spark plug performance more quickly.
What Is The Simulated RPM Range Of SPT105?
Use the control as a repeatable bench firing-rate setting. Ask AUTOOL to confirm the delivered hardware and current operating range before ordering when the exact minimum is critical.
Does SPT105 Support Long Spark Plugs?
Yes. SPT105 has adjustable test-hole height for longer spark plug ends, including compatible plugs used by BMW, Volkswagen, Audi, and other vehicles. Confirm the exact plug thread, seat, reach, terminal shape, and cover clearance before testing.
Which Voltage Option Should I Choose?
SPT105 has 110V / 220V input options. Confirm the correct voltage option for your local power supply before ordering or connecting power.
Does SPT105 Have A Digital Display?
No. SPT105 does not include an LCD digital backlit screen. Choose SPT301 or SPT360 if a digital display is required.
What Is The Difference Between SPT105 And SPT101?
Both provide two air-bench comparison positions and a protective cover. SPT105 adds adjustable socket height. Its lower firing-rate label differs between the page and manual, so do not use a single 0-rpm figure without version confirmation.
What Is The Difference Between SPT105 And SPT301 / SPT360?
SPT105 provides two positions and no digital setting display. SPT301 provides one reference and two test positions; SPT360 provides one reference and four test positions. SPT301 and SPT360 list 200–9000 rpm simulated settings, which are bench firing-rate labels rather than real engine load.
Should I Close The Protective Cover Before Testing?
Yes. Close the protective cover before testing to reduce direct exposure to sparks and improve operational safety. Keep hands away from the test hole area while the tester is working.
Georgi Angelov ✓ Verified Purchase –
It's as advertised.
Reliable and durable construction, fast delivery, highly recommended! Highly tested spark plugs, adjustable spark plug hole height
Devin Roopnarine ✓ Verified Purchase –
AUTOOL SPT105 Spark Plug Tester Tool
Customers love seeing the visual of the difference between how a spark plug is meant to work vs when their spark plug is not working correctly.
Kitty ✓ Verified Purchase –
Easy to use.
This product is great my husband loves it!