Troubleshooting - Yamaha EF3000iSE Service Manual

TROUBLESHOOTING

ENGINE DOES NOT START
Check that the oil level
warning light turns on by
pulling the starter rope.
DOSE NOT
LIGHT ON
TURN ON
Check engine oil level.
SUFFI- INSUFFI-
CIENT CIENT
Check fuel level.
SUFFI- INSUFFI-
CIENT CIENT
Check if fuel is deterio-
rated.
GOOD NOT GOOD
Check fuel cock lever posi-
tion.
"ON" "OFF"
Check if fuel travels to fuel
cock.
GOOD NOT GOOD
Remove spark plug, attach
it to spark plug cap, and
then ground the spark plug
to check for spark.
GOOD WEAK OR
SPARK NO SPARK
Check carburetor for
clogged passages or fuel
overflow.
GOOD NO GOOD
Check compression using
compression gauge.
OUT OF
SPECIFICA- GOOD
TION
*
TROUBLESHOOTING
Check connections between engine
speed limiter/oil level warning unit and oil
level switch.
GOOD NOT GOOD
• Check spark plug for dirt and check
spark plug gap.
• Check for voltage leakage due to faulty
connection or broken insulation of the
spark plug lead.
• Check TCI unit coupler for corrosion or
faulty connection.
• Check the ignition system. Refer to
"IGNITION SYSTEM" in CHAPTER 4.
GOOD NO GOOD
3-51
ENG
Replace oil level
warning light,
engine speed lim-
iter/oil level warning
unit, or oil level
switch.
Add.
Add.
Replace.
Set to "ON".
Clean fuel tank, fuel
cock, and fuel pipe
strainer.
Clean.
Correct.
Replace.
Clean.