Vedeneyev M-14P, Maintenance Manual

Page: 28 / 381

41
ENGINE M-14P - TROUBLE SHOOTING
Troubles -that may be encountered, during starting and. operation of the M-14P engine at different ratings,
their causes and remedies are presented in the Table in the order of probability of their appearance.
Troubles and remedies of engine assemblies and systems are given in the respective sections of this
Maintenance Manual.
Trouble Possible cause Correction
1. Engine won't start (1) Throttle is opened too
wide or narrow
(2) Engine is underprimed
(3) engine is overprimed
(4) Fouling or wetting of
spark plugs
(5) Loss of compression
(6) Coil KP-4716 is faulty,
wire is shorted to frame
(7) Engine is too cold (in
winter)
(8) k/eak storage battery
(9) Priming system is in-
operative
(10) Magneto breaker point
gap is too small or too large
Set throttle to position corresponding to
28 to 38 /a (800 to 1100 r/min)
Prime engine through filling system
(Task Card ITo. 201)
Turn airscrew through 3 to 5 revolutions
with throttle open fully
Drive out spark plugs, wash and dry
them (Ref. 074.20.02, Task Card Ifo. 201)
Fill 30 to 40 g of oil into cylinders
through spark plug holes and turn shaft. If
trouble persists, check piston rings and cylinder
surface for condition, carry out operations under
072.30.00, "Trouble uhooting"
Check wiring, replace coil KP-4716
Warm up engine from external heat
source
Replace storage battery
Check operation of priming system and
eliminate defects
Adjust gap to be from 0.25 to 0.35 mm