Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Compression Check: Testing and Inspection

Compression Pressure, Checking

NOTE:
Engine oil temperature minimum 3O° C (86° F)
Throttle valve open fully (accelerator pedal in full throttle position)

- remove all spark plugs

- disconnect coil wire at ignition distributor and connect to ground with clamp

- check compression with tool US 1120

- operate starter until tester no longer indicates a rise in pressure

Compression Pressure Values