Yamaha YP20T Manuel D'utilisation page 31

A ENGINE DOES NOT START
B Turn the engine switch to "ON" (ON),
then pull the recoil starter and check if
the oil warning light flickers.
C Does not flicker
H
Pull the recoil starter and check the
spark plug for spark strength.
(See "WARNING")
WARNING
9 To prevent FIRE HAZARDS be
sure fuel is not present in the
spark plug area.
9 To prevent FIRE HAZARDS be
sure to place the spark plug as far
way as possible from the spark
plug hole and carburetor area.
9 To prevent ELECTRIC SHOCK do
not hold spark plug lead with
hand while testing.
I
OK
N Check the following.
9 Fuel cock clogging
9 Air filter element
clogging.
D Flickers
J
Does not spark.
O Clogged
P OK
E Check engine oil level.
F
Consult a
Yamaha dealer.
K Check the spark plug.
9 Type: BPR4ES (NGK)
9 Gap: 0.7–0.8 mm (0.028–0.031 in)
L Incorrect
Replace or
adjust gap.
Q
Clean or replace; If engine does not
start, consult a Yamaha dealer.
R Consult a Yamaha dealer.
– 26 –
700-104
OK G Level low
Add engine oil.
M
Clean the spark
plug.
700-105
OK