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3-72 FUEL SYSTEM (DFI)
Throttle Body Assy
Idle Speed Inspection
The normal idle speed is controlled by the ECU (Elec-
tronic Control Unit).
Idle Speed
Standard: 1 300 ±100 r/min (rpm) -both in and out of
water
High Altitude Performance Adjustment
High altitude adjustment is not required as the ECU con-
trols the air/fuel mixture automatically.
Throttle Body Assy Removal
•
Remove:
Seat (see Hull/Engine Hood chapter)
Air Filter (from Throttle Body Assy)
Throttle Cable [A] (see Throttle Cable Removal)
Air Inlet Duct
ISC (Idle Speed Controller) Connector [B]
Throttle Sensor Connector [C]
Throttle Body Assy Mounting Bolts [D]
Throttle Body Assy [E]
Gasket
Throttle Body Assy Installation
•
Install a new gasket.
•
Tighten:
Torque - Throttle Body Assy Mounting Bolts: 20 N·m (2.0
kgf·m, 14 ft·lb)
•
Install the throttle cable and adjust the free play.
•
Bind the harness [A] and connector in the band [B].
•
Route the harness [C] and tighten the band [D] correctly
(see Appendix chapter).
Throttle Body Assy Disassembly
CAUTION
Do not disassemble or adjust, the air screw, throt-
tle link mechanism and throttle body assy [A], be-
cause they are adjusted or set surely at the man-
ufacturer. Adjustment of these parts could result
in poor performance, requiring replacement of the
throttle body assy.
Throttle Bore Cleaning
•
Remove the throttle body assy (see Throttle Body Assy
Removal).
•
Check the throttle bore [A] for carbon deposits by opening
the valve.
If any carbon accumulates, wipe the carbon off the throttle
bore and throttle valve, using a cotton pad.
CAUTION
Do not rub these surfaces hard and do not use a
carburetor cleaning solution.