Mooney M20J - Page 189

MOONEY SECTION Vlll
MODEL M20J HANDLING, SERVICE & MAINTENANCE
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Allow five minutes after refueling for water and sediment lo
settle in the tank and fuel selector valve drain before taking
fuel samples or draining the gascolator.
Tank sump drains are near each wing root forward of the wheel wells.
A
small plastic cup is supplied in the loose equipment kit for obtaining fuel
samples. To collect a fuel sample, insert the cup actuator prong in the sump
drain receptacle and push upward to open the valve momentarily and drain
fuel into the cup. If water is in the fuel, a distinct line separating the water
from the gasoline will be seen through the transparent cup wall. Water, being
heavier, will settle to the bottom of the cup, while the colored fuel will remain
on top. Continue taking fuel samples until all water is purged from the tank.
The fuel tank gascolator control is on the cabin floor forward of the pilot's
seat. To flush the gascolator sump and the lines leading from the wing tanks
to the selector valve, turn the selector handle to the left, and pull the fuel
drain control for about five seconds. Repeat the procedure for the right tank,
being sure that the fuel drain control ring is returned to the closed position
and that the drain valve is not leaking.
ENGINE LUBRICATION
Operate the new engine at full power within the limitations given in Section
II.
Before every flight, check the engine oil level and replenish as necessary.
Check engine oil level after engine has been stopped long enough for oil to
drain back into sump. The oil filler cap access door is located in the top cowl-
ing. Any lubricating oil, either straight mineral or compounded, must conform
with AVCO Lycoming Spec No.
301F to be acceptable for use in engines.
New or newly overhauled engines should be operated on aviation grade
mineral oil during the first
50 HOURS of operation or until oil consumption
has stabilized. The
aircraft is delivered from Mooney with multi-viscosity
mineral oil.
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The engine is equipped with an external oil filter and the engine oil change in-
tervals may be extended from 50 HOUR to 100 HOUR INTERVALS providing
the filter element is changed at 50-HOUR INTERVALS.
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" CAUTION "
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If an engine has been operating on straight mineral oil for
several hundred hours, a change to additive oil should be
undertaken with caution.
REV.B 6-12-87
ISSUED 6-2-86