Mechanical Specifications

Air Fuel Mixture
CO content [1] between 0.2 & 8 %

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

Idle Speed
At operating temperature [2] 750 ± 50 rpm

Idle Switch
Closes [3] 1000 ± 150 rpm

Ignition Timing
At 750 rpm 15° ± 2° BTDC

Spark Plug Gap [3] 0.039 - 0.043in (1.0 - 1.1mm)

Valve Adjustment Hydraulic

[1] With 2.5 K ohm resistor in place of engine temperature
sensor and with Oxygen (O2) sensor disconnected.
[2] Automatic transmission in neutral and system in closed loop.
[3] Platinum spark plugs