Caution folks -
The link posted by Overdrive is for a Continental engine.
S300C is powered by a Lycoming with an RSA injector - Chalk and Cheese.
I would disregard the info on the Continental.
Full
RSA Support Page
It "grew out" of a pressure carburetor which was designed to avoid icing.
With the S300C start is just like "priming" a carburetor engine. When "hot" there is no need really to prime. Fuel pump "ON" for 5 secs - do NOT set mixture to "RICH" - fuel pump OFF. Hit the starter and when it starts slide mixture to RICH. Works every time as most times people over prime the things.
Be carfule on the S300 with worn mixture and throttle cables as they will break.
Also make sure that mixture is correct. Easy to check - on shutdown slide mixture slowly to cutoff and watch for RPM rise just before it stops. No rise Too Lean, Big Rise Too Rich. Should be around ~ 50 RPM Rise.
Of course if your idle mixture is out it will be a b!*ch to start. Some folk set up the S300 for certain conditions depending on the response you want on a "throttle chop" into auto. Sometimes they will "RICH CUT" which will brighten up your day!
