I had a similar problem several years ago when I first got my Spit. ISTR
that a yellow flame indicates a rich mixture. I adjusted the jet to the
extream settings, but no change. I ended up pulling the piston, loosening
the mixture needle, and extending it about 3/16 of an inch. After
reassembly, it adjusted out to a perfect blue flame.
-----Original Message-----
From: owner-spitfires@autox.team.net
[mailto:owner-spitfires@autox.team.net]On Behalf Of Douglas Braun &
Nadia Papakonstantinou
Sent: Wednesday, April 05, 2000 2:19 PM
To: spitfires@autox.team.net
Subject: Colortune Difficulties
Hello all,
My Spit has been idling sort of rough ('72 with stock Stromberg),
so I tried to use a recently-purchased Colortune to set it right.
I found that the flame was ALWAYS yellow, no matter how much I
adjusted the mixture.
I tried both lifting and pushing down the carb piston until it wouldn't run
any more,
and the flame stayed yellow. (So I know the problem is not a broken needle
adjustor
mechanism).
When I pull a plug, even after several minutes of idling, it always has
a textbook-perfect light grey deposit.
I tried this on two different cylinders, with the exact same result.
Apart from the somewhat rough idle, the car runs fine, and always starts
right
up, even in the middle of winter.
So, does a Colortune REALLY work?
I am tempted go spend more $$$ fore a real CO meter, but I hate throwing
good money after bad. Any advice?
Doug Braun
'72 Spit
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