I have a FO-31 book and going to time motor. I checked timing before messing with anything and its 10 degrees btdc at 600 rpms and 20 degrees at 1400 rpms.Book says run at high idle and retard timing to 30 degrees and shut motor off.Then disconnect and plug vacuum advance line and run at high idle and should be 18 degrees btdc. Then motor still high idle and vacuum disconnected reset to 22 degrees btdc then reduce to slow idle and timing should be 0-6 btdc.I have a question on whats high idle and whats low idle. Also can you just use timing light with vacuum connected.I haven't used a timing light in 25 years, Or does someone have a better way to time motor. Thanks for your advice and thoughts.
joe
joe