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Idle Speed (please!!)
Posted: Mon Jul 16, 2007 9:23 pm
by grahamt7
1098 - rpms at idel please oh guru types!
Posted: Mon Jul 16, 2007 10:04 pm
by myminor1969
Timing at 6 deg BTDC at 600 RPM. May then need to retard for unleaded. Then set idle high enough so the ignition light is not flickering on tick over.
Posted: Mon Jul 16, 2007 10:05 pm
by grahamt7
Thankyou!!!
Posted: Mon Jul 16, 2007 10:19 pm
by picky
should end up at about 900rpm by the way
Posted: Mon Jul 16, 2007 10:51 pm
by grahamt7
Mine is idling at about 600-650 and sounds as ruff as a dawg!
Posted: Mon Jul 16, 2007 11:42 pm
by Dominic
I have set mine to idle at about 600 rpm, the red ignition light just glimmering enough to see in daylight. Sounds very smooth.
Posted: Tue Jul 17, 2007 5:30 pm
by bmcecosse
Aye - 500-600 should be fine once warm. Slow as possible really - to give engine braking where required. If it's rough - then first check the vacuum advance is working (most are not) - then adjust the ignition timing for smoothest idle - then adjust mixture for smoothest idle - back to timing - back to mixture etc.
Posted: Tue Jul 17, 2007 5:36 pm
by chickenjohn
Other causes of rough idle can be worn or dirty carb, burnt exhaust valve or blowing head gasket.
Take the carb apart and very carefully clean it, then re-assemble and set the mixture and idle.
Posted: Thu Jul 19, 2007 3:09 pm
by dunketh
Mine idles at around 900. If I set it at 600 it would probably die when I press the clutch in!
Posted: Thu Jul 19, 2007 3:50 pm
by Packedup
The BoL for the Midget says 550 for the 1098 and 700 for the 1275. 1098 Mini is 750.
I don't seem to have my Minor BoL to hand, but I reckon the Minor should be around the same as the Mini 1098 as the engines seem to be the same (other than the crank, sump and all that transverse gubbins).