The short answer is:  before start, open the throttle full, close the mixture completely, and run the boost pump for 20 sec.  It purges fuel vapor from the lines above the engine.  (I haven't verified this; but Continental sez so)

Continental publication "Tips on Engine Care"  (TEC-1) is a wonderful resource for learning about your engine and on page 35 begins a 3-page illustrated explanation of what to do, and why, about a hot engine.  It is copyrighted and I see that TCM is now selling it for $25 a copy.  74 pages of great color illustrations and diagrams.  I think you can get a soft copy for free if you get a (free for Continental owners) account on TCMlink and there may be other places to find it, but I notice it *is* copyrighted.

http://cmipowerstore.aero/index.php/tips-on-engine-care.html


On Feb 23, 2013, at 9:58 PM, George Wehrung wrote:

All,

I actually got home today to fly the grey lady. It was a great flight to French Valley until I stalled taxiing and could not get the hot start to work for me. Quite embarrassing. So got back to home base and popped the top cowl off and noticed what I beleive to be a separate fuel priming circuit. I see the normal lines that run thru the fuel pump, gascolator, fuel flow transmitter and into the manifold on the right side of the intake manifold. Then the fuel path crosses over the top in a small stainless line to the spider manifold on the left side. Oh yeah, IO-550-N. non turbo. Then I noticed a pair of black rubber coated fuel lines on the left side of the engine that go to the intake manifold and the spider. The one to the spider looks like a drain line whereas the one to the manifold on the left side appears to be a priming circuit. So with what I beleive to be a priming circuit is there a different procedure for hot starts to move the vaporized fuel out of the injector lines?



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