Generac Power Systems OHVI GSH 190, Руководство по обслуживанию

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SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN
. Rotate the THROTTLE PLATE to it's closed position and
remove two THROTTLE PLATE SCREWS.
5. Rotate the CHOKE PLATE (if equipped) to its closed position
and remove the CHOKE RETAINER SPRING.
6. Remove the CHOKE SHAFT (if equipped) and the CHOKE
SHAFT SEAL.
7. Remove the THROTTLE SHAFT and the THROTTLE SHAFT
SEAL.
CARBURETOR GASKET
CARBURETOR
CARBURETOR
MOUNTING
BOLT
GOVERNOR ROD AND
ANTI-LASH SPRING
Figure 3-4. Removal of Carburetor
CARBURETOR CLEANING AND INSPECTION:
. Separate out all nonmetallic parts. Then, clean metallic
parts with solvent or commercial carburetor cleaner. DO
NOT PERMIT NONMETALLIC PARTS TO CONTACT SOLVENT
OR CLEANER.
2. Inspect the THROTTLE SHAFT. Replace if worn or dam-
aged.
. Inspect the CHOKE SHAFT (if equipped). Replace if worn
or damaged.
. Inspect the FLOAT BOWL. It must be free of dirt and
corrosion.
5. Inspect the FLOAT Replace if damaged.
6. After all metallic parts have been cleaned, blow out car-
buretor passages with compressed air.
*
when working with compressed air and solvents or
cleaners, be sure to wear appropriate eye protection
to avoid personal injury.
*
Generac recognizes that there are spray type carbure-
tor cleaners on the market, however Generac does not
authorize the use of carburetor cleaners. Also, Generac
does not recommend soaking a carburetor in any
cleaners since the carburetor might be damaged.
NOTE: On small frame engines a MAIN JET TUBE is pressed
into the carburetor body to a measured depth. Do NOT
attempt to remove this tube. Tube movement will
adversely affect carburetor metering characteristics.
CARBURETOR REASSEMBLY:
Reassemble the carburetor in the reverse order of disassem-
bly. The following rules apply:
. Blow metallic parts dry with compressed air.
2. A notch on the FUEL INLET VALVE mates with the FLOAT
(See Figures -5 and -6).
. The FLOAT SETTING is FIXED and NONADJUSTABLE.
. Before tightening the FLOAT BOWL NUT (Item ), make
sure the FLOAT BOWL is properly aligned with the GASKET
and the CARBURETOR BODY.
CARBURETOR INSTALLATION:
Using a new gasket, reinstall the carburetor as follows:
. Slide the new carburetor gasket over the carburetor
mounting bolts followed by the carburetor.
2. Connect the governor rod and anti-lash spring.
. Install the air cleaner box, filters and air cleaner cover as
described in “AIR CLEANER BOX INSTALLATION.”
CArbureTor AdjuSTMeNT
INITIAL ADJUSTMENTS:
(See Figure -7)
. The IDLE SPEED STOP SCREW is located at top of the
carburetor and contacts the THROTTLE SHAFT. After reas-
sembling the carburetor, complete an initial adjustment of
the STOP SCREW as follows:
a. Close the THROTTLE PLATE.
b. Hold the throttle plate in its closed position and back out
the idle speed stop screw.
c. Turn the idle speed stop screw until it just contacts the
stop tang of the throttle shaft. Then turn the idle speed
stop screw in one turn further.
NOTE: Final adjustment of idle speed can be accom-
plished with the engine running. Engines equipped with
optional automatic idle control require a special proce-
dure for idle speed adjustment. See Section 4, "Optional
Idle Control."
NOTE: The carburetor is equipped with a fixed main jet,
which requires no adjustment.
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