October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Vacuum Advance

Disconnect and plug vacuum hose at vacuum advance unit. Connect an auxiliary vacuum supply to vacuum advance unit. Connect a timing light and tachometer to engine. Observe timing at idle. Slowly increase engine speed to 2000 RPM. With vacuum applied, ignition timing should advance sooner.