Operation CHARM: Car repair manuals for everyone.
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

System Specifications

Air Fuel Mixture
CO content [1] between 0.2 & 0.8 %

Firing Order 1-2-3-4-5-6

Idle Speed
At operating temperature, in neutral 750 ± 50 rpm

Ignition Timing
At 750 rpm 15° ± 2° BTDC

Spark Plug Gap 0.031 - 0.035in (0.8 - 0.9mm)

Valve Adjustment Hydraulic

Crankshaft Rotation Clockwise


[1] With 2.5K ohm resistor in place of engine temperature sensor and O2 sensor disconnected.