272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf
272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf
272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf
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5. Lift the fuel tank. Disconnect the fuel hose from<br />
the carburetor fuel inlet (6), Fig. 10. Remove the<br />
fuel valve shut-off knob from the shut-off link (7).<br />
<br />
Fig. 10<br />
<br />
All Except Models 540000, 610000<br />
The fuel pump is actuated by pulsating crankcase<br />
vacuum from the engine. The vacuum pulse fitting (2),<br />
Fig. 11 is installed on the No. 1 cylinder valve cover.<br />
NOTE: A leak at the vacuum pulse hose or its<br />
connections will result in improper fuel flow.<br />
Inspect the fuel hose from the fuel tank (3), the fuel<br />
hose to the carburetor (1) and the vacuum pulse<br />
hose. Replace any hose that is stiff or brittle.<br />
NOTE: The fuel pump is available only as an<br />
assembly.<br />
<br />
6. Remove the fuel tank.<br />
ÒÒÒ<br />
Installation<br />
Ò<br />
Ò<br />
ÒÒ<br />
1. Hold the fuel tank above the engine. Connect<br />
the fuel hose to the carburetor fuel inlet. Insert<br />
the fuel valve shut-off knob to the shut-off link.<br />
2. Put the fuel tank in position. Install 2 shoulder<br />
bolts to each side of the tank. Torque the<br />
shoulder bolts to 140 in. lbs. (16 Nm).<br />
3. Install the air cleaner element, top plate and<br />
nut.<br />
4. Install the air cleaner cover. Secure the cover<br />
with the air cleaner cover knobs.<br />
ÒÒ<br />
Models 540000, 610000<br />
ÒÒÒÒÒÒ<br />
ÒÒÒÒÒ<br />
Ò<br />
ÒÒÒÒÒ <br />
ÒÒÒÒ<br />
ÒÒÒ<br />
ÒÒÒÒ<br />
ÒÒÒÒ<br />
Fig. 11<br />
<br />
The fuel pump (3), Fig. 12, is actuated by a lobe on<br />
the camshaft. Inspect the fuel hose (2) from the fuel<br />
tank to the pump and the hose from the pump to the<br />
carburetor (1). Replace fuel hoses if stiff or brittle.<br />
ÒÒÒÒ<br />
ÒÒ<br />
ÒÒÒÒÒ<br />
Fuel Pump<br />
<br />
<br />
General Information<br />
NOTE: Some applications use an OEM supplied<br />
remote fuel pump. These engines are<br />
manufactured without a fuel pump.<br />
The fuel pump allows for remote fuel tank<br />
installations. Fuel pressure is 1.5 psi (0.1 Bar). The<br />
pump will prime at 12” (30.5 cm) maximum lift.<br />
CAUTION: Excessive fuel pressure can result in an<br />
over-rich carburetor mixture and ultimately cylinder<br />
scoring and/or other engine damage, resulting from<br />
gasoline diluting the crankcase oil. FUEL PUMP<br />
PRESSURE MUST NOT EXCEED 1.5 psi (0.1 Bar).<br />
<br />
Fig. 12<br />
NOTE: Parts removed for clarity. The fuel pump is<br />
available only as an assembly.<br />
78