---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Tue 12/18/07: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:38 AM - Rough Engine (Chuck Deiterich) 2. 11:16 AM - Re: Rough Engine (Lynn Matteson) ________________________________ Message 1 _____________________________________ Time: 08:38:17 AM PST US From: "Chuck Deiterich" Subject: JabiruEngine-List: Rough Engine 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 _____________________________________ Time: 11:16:06 AM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: 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 > > ============================================================ _- > forums.matronics.com_- > =========================================================== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.