Today's Message Index:
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1. 08:38 AM - Rough Engine (Chuck Deiterich)
2. 11:16 AM - Re: Rough Engine (Lynn Matteson)
Message 1
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Remember I complained about my 2200 running rough at WOT with much soot
in exhaust pipes. On the ground I opened the wing tank valve (no pumps
at all) and gas poured out of the carb. (I am going to replace the float
needle with the one that has a stronger spring built in. The orange
tipped needle spring takes about 2 oz to depress it about 1 mm, the
stronger black tipped needle takes about 30 oz to depress it 1 mm.) With
the carb bowl off, it takes very, very little pressure on the old needle
to stop the flow.
I got to thinking maybe the float has taken on fluid. I weighed it at
the post office and it measured to be 0.4 oz. Bing factory says my white
float should weigh 10 grams or about 0.35 oz. (The scale only showed
tenths of oz.) So I suspended the float in a bowl of gas with a wire
through the hinges. With the float level, only 6 mm of the float was out
of the gasoline. This appears to me that the fuel in the bowl must be
this high before the float can apply pressure to the needle. The fuel is
supposed to be =BD in below the bowl lip when not on the carb, it will
be a bit higher when the float is in it, but not that much higher. I am
going to let the float "dry" out and check it in gas again. More later.
Chuck D.
N701TX
Message 2
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| Subject: | Re: Rough Engine |
My white float weighs 191 grains, (using a balance scale) converted
to .437 ounces, or 12.38 grams, just for comparison,
I've found that there are at least two different black-tipped
needles....I have one that has a black spring plunger and it is
strong, and one that has a silver spring plunger, and it is
considered by Bing to be "medium" strong. At least that's what the
invoice said for the silver one. It was shipped to be the companion
for the 1.5mm seat.
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/440+ hrs
On Dec 18, 2007, at 10:31 AM, Chuck Deiterich wrote:
> Remember I complained about my 2200 running rough at WOT with much
> soot
> in exhaust pipes. On the ground I opened the wing tank valve (no pumps
> at all) and gas poured out of the carb. (I am going to replace the
> float
> needle with the one that has a stronger spring built in. The orange
> tipped needle spring takes about 2 oz to depress it about 1 mm, the
> stronger black tipped needle takes about 30 oz to depress it 1 mm.)
> With
> the carb bowl off, it takes very, very little pressure on the old
> needle
> to stop the flow.
>
> I got to thinking maybe the float has taken on fluid. I weighed it at
> the post office and it measured to be 0.4 oz. Bing factory says my
> white
> float should weigh 10 grams or about 0.35 oz. (The scale only showed
> tenths of oz.) So I suspended the float in a bowl of gas with a wire
> through the hinges. With the float level, only 6 mm of the float
> was out
> of the gasoline. This appears to me that the fuel in the bowl must be
> this high before the float can apply pressure to the needle. The
> fuel is
> supposed to be =BD in below the bowl lip when not on the carb, it will
> be a bit higher when the float is in it, but not that much higher.
> I am
> going to let the float "dry" out and check it in gas again. More
> later.
>
> Chuck D.
> N701TX
>
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