Page 5
SKU 92697
For technical questions, please call 1-800-444-3353.
OPERATING INSTRUCTIONS
1.
NOTE: Performing a compression test requires the work of
two individuals; one
person to operate the vehicle’s ignition switch while the other person operates the
Compression Tester.
2.
The Compression Tester features a Hose Fitting that may be used for 18mm spark
plug holes and an adapter to allow it to fit 14mm holes. (See Figure A.)
3.
To perform a typical compression test, prepare the engine for compression testing
by starting the engine and allowing it to warm up to its normal operating tempera-
ture. Then, switch off the ignition.
WARNING! Avoid carbon monoxide poisoning! Never run a gasoline en-
gine in an enclosed garage or other contained area.
4.
Once the engine has been turned off, disconnect both coil wires from the coil of
the engine, and remove all of the spark plugs. Note: Insulate coil wires or route
them away from each other and all metal surfaces. Make note of which spark plug
wires go to each spark plug locations. (See Figures B and C, next page.)
9.
WARNING! The warnings, precautions, and instructions discussed in this
manual cannot cover all possible conditions and situations that may occur. The
operator must understand that common sense and caution are factors, which
cannot be built into this product, but must be supplied by the operator.
GAUGE
HOSE
18mm
FITTING
AIR RELEASE
BUTTON
FIGURE A
14mm
ADAPTER
