TM55-2840-251-23
Section X ENGINE TESTING (Continued)
1-94
GROUND TEST OF ENGINE
INSTALLED IN AIRCRAFT
(Cont)
9.b. (Cont)
(2)
Accomplish satisfactory engine start
(subpara- graph 3).
(3)
Allow engine to warm up to operating
temperature and instruments to stabilize.
(4)
With propeller in fine pitch, and oil
temperature at 100'F (38'C
) minimum, observe Ng at idle
speed. Observed Ng should be 51% minimum.
(5)
If idle speed is incorrect, adjust Lo-idle
speed adjustment (10) as required. (Turn clockwise to
increase speed and counterclockwise to decrease speed.)
CAUTION
Turn
screw
in
minute
increments,
as
adjustment is extremely sensitive.
c.
Barometric Pressure Between 28.65 and 26.25
in. Hg. At barometric pressure between 28.65 and 26.25 in.
Hg., check idle speed adjustment as follows:
(1)
Perform pre-start check (subparagraph
2).
(2)
Accomplish satisfactory engine start
(subpara- graph 3).
(3)
Allow engine to warm up to operating
temperature and allow instruments to stabilize.
GO TO NEXT PAGE
1-158
