On Mar 4, 7:55*am, Peter Clark
wrote:
On Tue, 4 Mar 2008 07:27:21 -0800 (PST), Tina
wrote:

Injection computer? *In a 172R/S? *All there is is a completely
mechanical fuel distribution servo and a spider. *As for priming the
system, wouldn't pulling through enough times make the engine driven
pump eventually suck enough gas in? *I've never tried to hand prop
anything so I don't know where the process here failed.

I"ve never flown an injected engine that would start without first
priming it with the electric pump. Perhaps if you pulled through 30-40
blades the fuel may pressurize put the goal in hand propping is to
have the engine primed and ready so it starts on the first pull.
Pulling too many times wears you out and is asking for trouble.

-Robert, CFII (Aeronca propper)