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doug(at)ripleyair.com
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 Posted: Tue Mar 18, 2008 7:04 am Post subject: carb |
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Last summer I flew my M-14P home, installed on a Lockheed AL-60. The engine
was removed from that airplane for PT-6 installation, and the M-14 is going
on my Model 12 Pitts. The engine ran fine on takeoff, but climbing above
3,000' MSL it was running rough. The airplane was equipped with carb heat,
and that helped, so I believe that it was running lean. The flight was
about 3 hours, and carb heat and low power settings helped. Didn't have a
chance to see how it ran when we got down low again, out of daylight and
ready to get on the ground! The engine has not ran since.
The Pitts won't be ready to fly for about a year, but I'm considering what
to do about the carb. I would prefer to keep it rather than change to fuel
injection. Anyone have a simple answer?
Thanks!
Doug Ripley
www.ripleyair.com
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dsavarese(at)elmore.rr.co
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| Posted: Tue Mar 18, 2008 4:59 pm Post subject: carb |
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Try going through the carburetor adjustments listed in the task cards for
the carburetor in the M14 manual. You may possibly have a barometric
chamber that is improperly set or inoperative. Also you may have a bad
diaphragm in the carburetor. You can remove the barometric chamber section
from the carburetor while it is installed on the engine. The diaphragm is
between the carburetor body and the barometric chamber section. It is a
VERY thin membrane. Be very careful not to damage it when removing it from
the carburetor just in case it is not damaged.
Dennis
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