01-12-2020, 08:33 PM
Hi Roger
I have used a Colortune in the past on my Seven (HC head, 14mm plugs). The blue colour with occasional white flashes looks like what I would expect for a correct mixture.
The occasional missing flash when idling is also normal, in my experience.
During this test the engine won't be loaded much, except briefly whilst the heavy flywheel is sped up. But in any case, the device is aimed at users setting idling mixture, with the assumption that the carb is correctly jetted/needled for higher revs and throttle openings.
I have used a Colortune in the past on my Seven (HC head, 14mm plugs). The blue colour with occasional white flashes looks like what I would expect for a correct mixture.
The occasional missing flash when idling is also normal, in my experience.
During this test the engine won't be loaded much, except briefly whilst the heavy flywheel is sped up. But in any case, the device is aimed at users setting idling mixture, with the assumption that the carb is correctly jetted/needled for higher revs and throttle openings.