Carburetor Servicing - All Models
Do not attempt to run engine with any fuel system component disconnected or removed. Fuel leakage could contribute to a fire or explosion.
Calibration
To accommodate changes in factory specifications, weather conditions, or altitude, carburetor calibration can be adjusted without removing the carburetors.
The idle mixture is controlled by an air bleed orifice® . The intermediate mixture is controlled by an air bleed orificefl. The high speed mixture is controlled by a fuel orifice©.
Using the engine’s model number, refer to current parts catalog and orifice list in Section 1 to determine correct orifice size.
Removal
Avoid pulling "ES. 1763” fuel line off fuel fittings. Push of‘f wherever possib|e. When removing “ES. 1763” fuel line from VROéS’ fittings, carefully cut the hose to avoid damaging the fittings. 1. If equipped, remove the power steering hose support bracket. Loosen the retaining screws and remove the port and starboard lower engine covers.
2. Remove the retaining screws and remove the air silencer assembly.
3. An individual carburetor main body can be removed without disturbing the throttle body or linkage.
4. Cut the tie strap securing the main body fuel supply hose and carefully remove the hose.
5. To remove the main body for inspection and cleaning, remove four screws (two long, two short) securing it to the throttle body.
6. If you are removing a carburetor assembly, loosen the throttle shaft links at one or both ends.
7. Cut both fuel supply hose tie straps and remove two screws and two nuts securing the throttle body to the intake manifold.
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