Ignition Timing: Adjustments

1. Engine should be at operating temperature.

Engine Component Locations:

2. Disconnect or clamp vacuum hose to vacuum advance unit. Hose can be found on right side of engine under rear part of intake manifold, between intake runners #4 and #5.
3. Start engine and run at 3000 rpm.
4. Check timing. Should be:

18° ± 2° BTDC 3000 rpm, vacuum unit disconnected