Repair manual for Intek V-twin overhead valve (OHV) engines. Model series 405700, 406700, 407700, 40F700, 40G700, 40H700, 445700 and 446700. To maximize engine life, meet original equipment specs and provide full warranty coverage, always use genuine parts from Briggs & Stratton.

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. For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Other Briggs & Stratton Commercial Power Repair Manuals: 272147 - Single Cylinder OHV Air-Cooled Engines 272144 - Vanguard™ Twin Cylinder OHV Air-Cooled Engines 275429 - Vanguard™ Twin Cylinder OHV Liquid-Cooled Engines REPAIR MANUAL MS-0750 - Vanguard™. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine MODEL 473100 2 CYLINDER LIQUID COOLED ENGINE COMMERCIAL POWER MANUAL NUMBER: 275429. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine SAFETY INFORMATION.

Prior to work, read and understand the section(s) of this manual that pertain to the job. Follow all safety The Briggs & Stratton engine is made of the finest warnings.

Material in a state-of-the-art manufacturing facility. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Table Of Contents MODEL 473100 CHARGING SYSTEM.23 2 CYLINDER LIQUID COOLED ENGINE BATTERY INFORMATION.25 COMMERCIAL POWER. 1 EQUIPMENT SAFETY INFORMATION.2 AFFECTING ENGINE OPERATION.26 IN THE INTEREST OF SAFETY. 2 SECTION 3 SECTION 1 ENGINE DISASSEMBLY.27.

Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Table Of Contents REPLACING PINION GEAR ASSEMBLY.47 SECTION 6 FINAL ADJUSTMENTS AND CARBURETOR INSPECTION AND REPAIR. 51 SPECIFICATIONS.71 GENERAL INFORMATION.71 SECTION 5 ENGINE ASSEMBLY.57 REMOTE GOVERNOR CONTROLS.71 INSTALL CRANKSHAFT. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information SECTION 1 GENERAL INFORMATION BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEM This chart explains the unique Briggs & Stratton numerical model designation system.

It is possible to determine most of the important mechanical features of the engine by merely knowing the model number. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information ENGINE IDENTIFICATION Oil Fill Cap Fuel Pump Dipstick Muffler (If Equipped) Spark Plug Choke Control 12V Electric Starter Throttle Control (2 Possible Locations) Oil Drain Plug Radiator Reservoir (If Equipped) Fan Belt (If Equipped) Oil Filter Fuel Filter. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information MAINTENANCE SCHEDULE Daily 50 Hours 100 Hours 250 Hours 600 Hours Yearly Check Oil Level Check For Oil Leaks Change Oil Change Oil Filter Check Coolant Change X.

Coolant Check Fan Belt Clean Air Filter. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information FUEL AND OIL RECOMENDATIONS Gasoline Use clean, fresh, unleaded gasoline. Leaded gasoline may be used if unleaded is not available.

A minimum of 85 octane is recommended. The use of unleaded gasoline results in fewer combustion deposits and longer valve life.

Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information CHANGING OIL AND OIL FILTER 9. Replace oil fill cap and dipstick.

Start and run engine to check for oil leaks. Change oil and filter after first fifty (50) hours of operation. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information Normal coolant temperature gauge (if equipped) should 1. Loosen bolt and bolt read between 175° and 195° F (80° and 90° C) when 2. Fit torque wrench in the square hole located in the engine is running. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information REPLACE SPARK PLUG bore to wear quickly. As the rings and cylinder bore become worn, these abrasive particles enter the crankcase and contaminate the oil, forming an abrasive Replace spark plugs every year.

Replace spark plugs if mixture which will cause wear on all of the internal electrodes are burned away, or the porcelain is cracked. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 1 - General Information Page 10. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting SECTION 2 3. If starter cranks, there is a problem with the key switch or wiring. TROUBLESHOOTING GENERAL INFORMATION Most complaints concerning engine operation can be classified as one or a combination of the following: 1.

Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting STARTER CURRENT DRAW TEST 5. A fully charged 12 volt battery. Testing Starter IMPORTANT: When making the starter current draw NOTE: To prevent engine from starting, remove test make sure that all parasitic load is removed from the spark plug wires from spark plugs and ground engine and that engine has the correct viscosity oil. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting NO LOAD STARTER CURRENT DRAW 3. Attach negative battery cable to a good ground such as drive housing. Attach positive battery cable to battery terminal on solenoid.

Remove starter motor. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting Check Ignition (With Engine Starter) Check Ignition (Engine Running) With spark plugs installed, attach a ignition tester If engine runs but misses during operation, a quick check #19368 to each spark plug lead and ground the other end of the to determine if ignition is or is not at fault can be made by tester as shown in Fig.12. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting DIODE FAILURE DIAGNOSTIC TABLE Ground Wire Harness Diode Diode Fig. 14 Equipment If miss continues: Switch The problem may be carburetion or compression related.

See Check Carburetion and/or Cylinder Balance Test and Cylinder Leakdown Test. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting If meter “Beeps” once, diode is OK.

If plugs are dry, look for: If meter makes a continuous tone, diode is defective 1. Leaking carburetor or intake manifold mounting (shorted). Replace ground harness. Gaskets If meter displays “OL,”. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting Testing Equipment Wiring 4.

If solenoid does not “click”, it is defective. With keyswitch in position, disconnect solenoid wire (GRAY WIRE) from engine wiring harness connector (WHITE WIRE). Insert red meter test lead into equipment side of wiring harness connector (WHITE WIRE), Fig. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting CYLINDER BALANCE TEST If the engine is hard starting, runs rough, misses or lacks power, perform a cylinder balance test to determine whether both cylinders are operating to their full potential. Tools Required 1. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting there will be no RPM loss. When the other cylinder is because compression components are not at normal grounded out the engine will stop.

Operating temperatures. Remove spark plugs from engine.

Disconnect air: A twin cylinder engine will run well on cleaner tube and crankcase breather tube at one cylinder as long as the power required for. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting 9. Listen for air leaking from the cylinder head 5.

Pull the regulator adjustment knob out and gasket, carburetor, exhaust system and the turn knob counterclockwise as far as it will go, Fig. Crankcase breather tube. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting 11. Disconnect outlet hose from tester before a.

Briggs Stratton Engine Repair Manual 1330

Briggs And Stratton Troubleshoot

Coolant level must be no more than 1 in. (.25 removing from spark plug hole. Mm) below bottom of filler neck. Repeat test for other cylinder. The variation between the two cylinders should be less than 20%. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting 5. Remove thermostat from water and allow it to cool.

Thermostat should close fully. 26 The water pump seal is replaceable. See Section 4.

27 If system does not maintain pressure and no leaks are evident externally, there may be an internal leak such as CHECK OIL PRESSURE SWITCH a blown head gasket, warped cylinder head or cylinder. Vanguard Twin-Cylinder OHV Liquid-Cooled Engine Secti

Briggs 1330 Repair Manual