Pilot Screw Adjustment; Idle Drop Procedure - Honda Fourtrax Rancher AT 2004 Service Manual

PILOT SCREW ADJUSTMENT
IDLE DROP PROCEDURE
Damage
/0
the pIlot
screw seat
will
occur
if
the
plio/
screw is
tightened
against the sear
NOTE :
• The pilot screw is factory pre-set and no adjust-
ment is necessary unless the pilot screw is
replaced .
• Use a tachometer with graduations of 50 rpm or
smaller that will accurately indicate a 50 rpm
change.
1. Turn the pilot screw clockwise until it seats
lightly, then back it out the specification gillen .
Thi s is an inilial setting prior to the final pilot
screw adjustment.
INITIAL OPENING: 2 -114 turn s out
2. Warm up the engine to operating temperature.
Stop and go driving for 10 minutes is sufficient.
3. Stop the engine and connect a tachometer
according to the tachometer manufacturer 's
instructions.
4. Start the engine and adjust the idle speed wi t h
the throttle stop screw knob.
IDLE SPEED: 1.400 ± 100 rpm
5. Turn the pilot screw in or out slowly 10 obtain Ihe
highest engine speed.
6. Lightly open the throttle 2 - 3 times, then adjust
the idle speed with the throttle stop screw knob.
7. Turn the pilot screw in gradually untillhe engine
speed drops by 100 rpm.
8.
Turn the pilot screw out 10 the final opening.
FINAL OPENING: , tums out from the position
obtained i n step #7
9. Readjust the idle speed with the throttle stop
screw.
FUEL SYSTEM
6-23