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Ed,
What gets you is the $0.25 parts like O-rings, they can really screw-up you
day.
Had o-ring on both sides of the mechanical fuel pump go bad at the same
time, not too long after I got my plane last spring. Not much fun to track
down fuel smells.
May as well go over these small details during maintenance and have some
spare in our tool kit.
Alain
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of James Brewer
Sent: March 9, 2006 7:48 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Ed's O ring
Guys,
Ed said: I had a fuel leak on the primary injectors.
> The place it was leaking from was where the hose fitting connected
> to the fuel rail. Well, first I tighten things a bit, no good.
> Then I replaced the AN fitting screwed into the fuel rail thinking
> it has gotten scratched or warped - no good. Then I ended up
> replacing the hose side - STILL no good. Turns out one of the top
> O rings on one of the primary injectors was leaking, running down
> the rail and dripping off the fittings. Aghhhh! Two days and
> several fittings later, replacing the O ring solved the problem.
I just had the same problem in my 87 RX7. The O-ring in the secondary
injector
was leaking just like Ed's. When I pulled it out a piece of the O-ring was
missing.
I went everywhere I could think of in this small town to find a suitable
replacement
to no avail. I ended up using one off an ebay spare fuel rail I had. I
had a box
of SAE O-rings but there wasn't one that would fit. Word to the wise, make
sure you replace
all of the injector O-rings when rebuilding. Make sure you put some
suitable lube on the
rings before installing. I would recommend keeping a spare set in case
yours leaks. Having
to remove the intake to replace the little bugger was no fun! Ed and I
could have had a fire
due to the leak---so could you! Be careful out there, you hear?
Jim Brewer
Albemarle, NC
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