Afp purge valve

[Stu McCurdy]

I installed the purge valve on initial assembly back in 2001 on IO-360. Yes return spring should be installed in case cable breaks. 1970 hours later, I use it every start, hot or cold. Makes starts predictable. Master On, Ignition On, Purge valve handle out, mixture control half way, throttle slightly forward, boost pump on for 3-4 secs and off, mixture idle, PURGE VALVE BACK IN and LOCKED. Crank a few blades and it is running.

[N427EF]

Directly from McFarlane.
http://www.mcfarlaneaviation.com/Pro...CategoryID=235

Get one long enough and without the threaded end, you can custom size it when you install the cable.

[AlexPeterson]

I've been happy with this one for 15 years. The knob is maybe 1" in diameter.

[Kyle Boatright]

Any sense of the typical length of one of these cables for an RV-10? IOW, do I need, the 6', 8', or 10' cable? I'm guessing a 6' would be fine...

[David-aviator]

The purge valve provides better control over fuel to distribution lines.
There are differing techniques to use it, but invariably start hot or cold and shut down are more predictable.
In 245 hours I developed a technique of priming for 7 seconds cold, zero for hot but circulate for two minutes, both with WOT. Purge valve knob in and out for cold prime, no prime hot just circulate.

Throttle setting matters as fuel flow varies from about 1 gph to 4, this is factor with cold priming.

To start hot or cold, throttle open slightly, simultaneously engage starter and purge valve knob in...engin starts.

I like the purge valve, had it on 7 and 8 with BPE IO-360, 180 hp.

[Bevan]

I like the purge valve and always use it for shut down. Be sure to use steel fittings especially the fitting between the purge valve and the divider.

It would be nice if it came with a place to connect a return spring or better yet if it came with an integral return spring.

Bevan.

[rvdave]

Purge valve knob in and out for cold prime

Can you elaborate on your procedure for priming?

[RV10Pilot]

Ernst
Where does the other end of the purge valve spring attach? To the baffels?

[Tom Martin]

Many years, with numerous aircraft, no purge valve and no problems.

[Auburntsts]

Originally Posted by Tom Martin

Many years, with numerous aircraft, no purge valve and no problems.

Different strokes for different folks. I like mine and the AFP FI system that it's a part of.