MooNEY
@-
OWNERS MANUAL
The preservative oil in the new engine should be removed
after the first 25 hours of operation. Replace the original
preservative oil with only straight mineral oil.
Do not
change to or add additive-type oil (high detergent or com-
pounded) during the first 50 hours of operation, or until a
normal rate of oil consumption has been established.
After oil consumption has stabilized, any straight mineral
or additive-type engine oil may be used that conforms to
Lycoming specification No.
301E.
Following the break- in
period it
is
permissible to change from straight mineral
(break- in) oil to an additive (high detergent) oil and observe
the normal oil-change intervals.
However; when changing from straight mineral oil to an
additive- type oil at a later time (up to
25
0 hours after break-
in), the following precautionary measures should be ob-
served:
(1)
Change the oil again after not more than five hours of
operation.
(2)
Check
all
oil screens for evidence of sludge or plugging.
Change the oil every 10 hours if sludge conditions pre-
vail. Change the oil
at
normal intervals after sludge
conditions improve.
(3)
If the engine has been allowed to operate on straight
mineral oil for several hundred hours, or
if
the engine
is
in an excessively dirty condition, defer the change
to additive oil until after engine overhaul and operation
for
at
least 50 hours.
Your Mooney Dealer will change
the engine oil in addition
to performing
all
other service and inspection procedures
needed when you bring your airplane in for its 50- hour,
100-
hour, and annual periodic inspections. The engine oil
should, however, be replaced
at
25-hour intervals after
prolonged flight in adverse weather, after continuous oper-
ation
at
high power settings, or when making short flights
with long ground-idle time.
Excessive oil sludge buildup
indicates that the oil system needs servicing
at
less than
5
O-
hour intervals.
To Next Page
