schedule for carburetor overhaul?
in General Tech Discussion
13 years ago
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Re: schedule for carburetor overhaul?
by Roger Lee » 13 years ago
Hi Al,
If you use anything to dress an "O" ring or gasket around the fuel or oil system then use White Lithium Grease.It is compatible with fuel and oil and when it gets hot or mixed it just turns back to an oil more or less and blends with the fuel or oil. I do rub some of my "O" rings with it and I have done so at times on some gaskets. No need to glob it on just rub it on or in and don't leave any globs. It will also help some "O" rings to seat into their respective position too and instead of a dry pushed in fit that sometimes can cause an "O" ring to roll or flatten out of place. Some discretion here is warranted and it isn't for everything.
In the case of a leaky carb bowl gasket just replace them. I always keep some on hand because bowl gasket leaks do happen.
Her's another tip. If you need to pull the carb bowl off many times the drip tray or something else is in the way. You can remove the 4 screws that secure the air intake on the affected side and this will allow you to lift the carb high enough to pull the bowl to remove it and dump bowl debris or replace the gasket. Just make sure not to drop anything down that air intake hole or it will cause damage to a valve. Then torque the 4 screws back down to 90 in/lbs.
Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell
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Re: schedule for carburetor overhaul?
by MARK JACKSON » 13 years ago
"speak of the devil"
Some one came up to me yesterday when I was between lessons. He had just landed and said his engine was running rough on final and when he landed the engine ran very rough and then stopped. He restarted it but it wouldn't tick over, as it would run rough and then stop.
The tray under his carb was wet with fuel and so we removed the carb and float chamber. I new straight away what the problem was, and with the correct maintenance it would have been avoided.
This is what we found.
IMG_1829.JPG (You do not have access to download this file.)IMG_1833.JPG (You do not have access to download this file.)
Thank you said by: Wayne Fowler, Tony Armour
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Re: schedule for carburetor overhaul?
by Capt. Siva, » 7 years ago
kindly guide in detail of CARBURETOR RUBBER parts that required to change After 05 years of times?
list required please
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Re: schedule for carburetor overhaul?
by Leopold Schmidt » 7 years ago
David,
I would suggest to call Lockwood or Roger.
Al and Roger,
I just signed up to the forum. Many thanks for your (already 5 years old) thoughtful explanations! I have learned a lot from your, Roger, most competent contributions (here and at matronics) - and from Mike Busch, however. I must admit I generally tend somewhat more to the approach of Mike Busch (who gives more emphasis to: 'don't fix it if it ain't broke'). I myself may legally do so. My 80 hp Rotax 912 runs since about 8 years/1400 hrs in a German ultralight and in this legal framework maintenance is at the end of the day owner responsibility. I do take maintenance -very- seriously and spend quite some time on it. Many things I would never do myself. But after more than 30 years of aircraft ownership I consider myself a fairly experianced amateur with an appropriate toolbox.
My experiance on Bing 64 carburators: I take always -one- apart every 100 hrs and inspect it. The carbs deteriorate slowly over the years: Slight traces of vibration wear, I had to replace both needle valves after 700 hrs. Otherwise they never gave me any trouble at all and I did not do the 200 hrs. carb overhaul. I fly exclusively with autofuel, 10% alcohol.
Leopold
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Re: schedule for carburetor overhaul?
by James Ott » 7 years ago
I fly with auto fuel-no alcohol and don't plan to disassemble the carbs until 5 year rubber replacement, which for me will be about 800+ hours. As long as they are running perfectly I tend to go along with Mike Busch also-Don't fix what isn't broke. I have two friends with 912uls who haven't disassembled the carbs for over 1000 hours, and 700 hours. I do remove the bowls every annual to check for dirt and good floats, and carefully inspect the sockets externally.
Thank you said by: Capt. Siva,
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