MRCARTOOL Dual-Hole Spark Plug Tester with 0-6000 RPM Adjustment & Safety Cover

Check Spark Plug Strength Two at a Time Under Simulated Engine Speed

This bench tester simulates engine working conditions to fire two 12 V gasoline spark plugs at once, so you can tell good plugs from weak ones by the strength of the spark. A clear protective cover closes over the sockets during the test.

Dual-Hole Testing
0–6000 RPM Adjustable
Protective Cover
Signal & Power Indicators
Plug and Play

Key Features

Simulated Engine Operation

Turn the rotary switch to change the simulated speed and compare how the plugs perform under different working conditions.
Dual-Hole Testing

Test two spark plugs at the same time to save time.
Protective Cover

A clear cover closes over both sockets so the spark can be watched safely during the test.
Status Indicators

A high-voltage indicator for each socket and a power indicator show the spark plug status at a glance.
Plug and Play

Simple operation with no setup beyond power and the rotary switch.

Highlights

MRCARTOOL spark plug tester with two spark plugs being inserted into the dual test sockets — Two Sockets

Insert two plugs and test them side by side.

Rotary switch on the MRCARTOOL spark plug tester with a 0 to 6000 rpm dial scale — Adjustable Speed

The rotary switch sets the working frequency from 0 to 6000 rpm.

MRCARTOOL spark plug tester with its clear protective cover open over two spark plugs — Protective Cover

Close the cover before testing to protect the operator.

More Specifications

Working principle	Digital sensing
Main unit dimensions	145 × 95 × 113 mm
Controls and ports	Rotary switch, power port

Basic Version vs H90

	Basic Version	H90
Simulated RPM	0–6000rpm	500–9000rpm
Safety protection cover	Yes	No
HD digital display	No	Yes
Battery clip design	No	Yes
Adjustable hole position height	No	Yes
Supports long spark plugs	No	Yes

What’s in the Box

Main unit
Power cable
User manual

MRCARTOOL spark plug tester main unit with dimensions, power cable, package box and user manual — Main unit, power cable and user manual.

How to Use

Insert the plugsPlace the spark plugs in the test holes.
Close the coverClose the protective cover over the sockets.
Power on and set speedConnect the power supply and adjust the working frequency with the rotary switch.
Watch the sparkObserve the spark plug test status through the protective cover.

Good to Know

Caution

Do not insert or remove a spark plug while the tester is powered; turn the power off first.
During operation the spark plug voltage reaches tens of thousands of volts; do not touch it with your hands.