After nearly a year and many flights, I am yet to find a reliable, repeatable cold start procedure for my carburetted F23.
Warm starts are fine- crack the throttle a bit, no choke, and it fires within a couple of seconds cranking.
But cold starts are still a mission-
My routine is usually squeeze bulb until I feel back pressure to ensure the carb bowls are full; throttle at idle; choke on; mags on; and crank.
Very occasionally OK, but most times I need 5-10 x 5 second sessions of cranking with/without choke, various throttle settings; and when it fires definitely requires throttle and some choke for about 5-10 seconds to settle it at about 2000rpm for warm-up.
That seeems to indicate not enough priming.
What procedure/tricks do you guys have for starting?
Hah- I have solved the problem!
After writing the post above, I decided I need to take a good look at the choke/enricher system, as it was likely the issue was inadequate priming.
I slid the rubber boots clear of where the cables terminate in the carbs, and found that even with the choke lever at full ON, one cable was still loose (ie not opening the enricher port at all) and the other was just barely opening.
I wound out the adjusters till the cables were just loose at choke lever OFF, and enricher ports fully open at choke lever ON- the adjusters ended up very close to maximum extension.
The system was untouched since delivery, so I suspect what happened was initially a cable outer may have not been fully home in the metal end sleeve when the carbs were set up, and with use it has bedded in and thus relaxed the whole enricher system.
Happy days for me and the starter motor!