Yesterday I removed the upper cowling. I also prepared a 60 ml syringe by attaching
a section of ¼” hose to the end. I
safety wired the hose to the syringe.
Today I modified a section of oil spout from an oil bottle to make a
fitting which will go into the port on the carburetor. I then moved the airplane out onto the apron
and closed the hangar doors. I started
the engine and let it run for 2-minutes to ensure the carburetors were full of
fuel. I pushed the airplane back inside
and proceeded to perform the test on the left carburetor. I removed the choke spring and vent tube. I removed the 4-screws holding the choke
assemble to the side of the carburetor.
Using the syringe containing 60 ml of fuel I injected fuel into the
lower port until it began coming out of the vent tube. It took 25 ml’s of fuel. The range of fuel volume for filling the
float chamber is 23- 40 mls. Any amount less or more indicates a
problem. The left carburetor is acceptable. I reinstalled the choke
assembly, vent tube and spring. I then
repeated the process on the right carburetor.
Both the left and right carburetors are acceptable. They both required 25 mls of fuel to fill the float chambers. After putting everything back together
including the upper cowling and putting the 5-gallons of gasoline I purchased into the tank
I decided to go up for a test flight. It
was a beautiful day for the 7th of January. The temperature was 54o F and the
winds were light out of the south. I
took off on runway 16 and made 4-touch-and-goes. The engine continues to run great! I landed and put everything away. I brought the engine log book home and made
an entry certifying that Rotax SB-912-065 R1 has been complied with.
