272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

Fuel Filter
Replace the inline fuel filter yearly or every 100
hours, whichever occurs first. Replace the filter if dirt
or water are present. See the IPL for correct fuel
filter.
Inspect the carburetor connection (6) and fuel shutoff
valve (5) for leaks or damage, Fig. 13.
Inspect the tie wrap (2) securing the shut-off valve,
replace as required.
• CAUTION: When replacing fuel filter (3) on
Vanguard engines with the 9 quart fuel tank
(4), the fuel hose from the carburetor (1) must
be routed OVER the fuel shut-off rod (7) if
engine is equipped with a Mikuni carburetor, or
UNDER the fuel shut-off rod if engine is
equipped with Nikki carburetor, Fig. 13.
Fuel Shut-Off Valve
Engines equipped with an optional fuel tank will also
have a fuel shut-off valve, Fig. 15. Inspect valve for
ease of operation and leakage. Replace valve if
operation is difficult or if valve leaks.
CARBURETION
Fig. 15
NOTE: Some Briggs & Stratton V-Twin engines
operate on gaseous fuels. Information on
the gaseous fueled engines is in
Troubleshooting, Section 2.
Fig. 13
Early (8) and current (9) style fuel filter assemblies
for Vanguard engines with the 9 quart fuel tank
shown in Fig. 14.
NOTE: If the engine has an anti-afterfire solenoid,
remove blower housing so the solenoid wire
can be properly routed during reassembly.
Disconnect anti-afterfire solenoid wire from
equipment wire.
Carburetor Identification
Three types of carburetors are used on gasoline
Vanguard OHV V-Twin engines:
• One-piece Flo-Jet side-draft on Models
290700, 294700, 303700, 350700, 351400,
351700, 380400 and 380700.
• Two-piece Flo-Jet down-draft on Models
290400, 303400 and 350400.
• Fixed jet Flo-Jet side draft two barrel on
Models 540000, 610000.
Fig. 14
Carburetor Removal
Typical
Remove carburetor, spacer (3) and gaskets (2) from
manifold (1), Fig. 16.
Discard gaskets.
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