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SKU 92720 For technical questions please call 1-800-444-3353 PAGE 6
FIGURE B
FIGURE C
7. While cranking the engine, observe and record the maximum reading on the
Gauge (1) of the Compression Tester. (See Figure C.)
8. Once the maximum reading has been recorded, discontinue cranking the engine.
Then, release the air pressure in the Gauge (1) by pressing the Air Release
Button. (See Figure C.)
9. Remove the Compression Tester from the first engine cylinder. Then repeat
Steps #6, #7, #8 for the remaining engine cylinders. (See Figures B and C.)
10. NOTE: Good engine cylinder compression will be indicated with a high initial
reading, and a progressive build-up to the final maximum reading. Poor engine
cylinder compression will be indicated with a low initial reading, and a much
slower build-up to the final maximum reading. The compression readings for all
of the engine cylinders should not vary by more than 10%. Note: Check your
owner’s or maintenance manual for acceptable pressure ranges.
COIL WIRES
COIL
REMOVE
SPARK PLUGS
GAUGE
(1)
AIR RELEASE BUTTON
5. Attach either the Adapter Fitting (2) or Hose (3) and Hose Fitting (4) to the
Gauge (1). (See Figure A.)
6. Connect the Compression Tester to the first cylinder of the engine. With the fuel
pedal depressed all the way down, crank the engine for at least eight revolutions.
(See Figure C.)