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Briggs and Stratton 350447 Vanguard Engine

General Technical Data

Briggs and Stratton 350447 Engine Specifications

Engine Model ............ Briggs and Stratton 350447 Vanguard
Engine Type ............ 4-cycle V-twin overhead valve horizontal shaft air-cooled gasoline engine
Number of Cylinders ............ 2
Displacement, cu.in (cc) ............ 34.75 (570)
Cylinder Bore, mm (in) ............ 72.0 (2.83)
Piston Stroke, mm (in) ............ 70.0 (2.75)
Rated Engine Power, hp (kW) ............ 18.0 (13.3)
Rated Engine Speed, rpm ............ 3600
Idle Speed, rpm ............ 1750
Lubrication System ............ Full pressure lubrication with spin-on oil filter
Air Cleaner ............ Dual-Clean, paper element with a foam pre-cleaner
Cooling System ............ Forced air
Ignition System ............ Magnetron Electronic
Starting System ............ Electric starter
Electrical System Rating, Volts ............ 12
Charging System ............ Alternator
Alternator Rating, Amps ............ 16

Fuel System

Fuel System Type ............ Carburetor
Carburetor Type ............ Float, down-draft
Governor Type ............ Mechanical
Fuel Type ............ Gasoline

Dimensions and Weight

Overall Length, mm (in) ............ 364 (14.4)
Overall Width, mm (in) ............ 314 (13.4)
Overall Height, mm (in) ............ 435 (17.2)
Net Weight, kg (lbs) ............ 40.1 (88.0)

Briggs and Stratton 350447 Maintenance Data

Cylinder Block and Valves

Cylinder Bore Inside Diameter (Maximum), mm (in) ............ 72.16 (2.839)
Cylinder Head (Max. Out of Flatness), mm (in) ............ 0.10 (0.004)
Intake Valve Clearance, mm (in) ............ 0.10-0.15 (0.004-0.006)
Exhaust Valve Clearance, mm (in) ............ 0.10-0.15 (0.004-0.006)

Engine Oil and Filters

Engine Oil Type (Summer) ............ SAE 30, 10W-30
Engine Oil Type (Winter) ............ SAE 5W-30
API Service Classifications ............ SF, SG, SH, SJ or higher
Oil Capacity, qts (L) ............ 1.75 (1.66)
Oil Filter Part Number ............ 492932S
Air Filter Element Part Number ............ 394018S/393957S

Ignition System

Spark Plug Type ............ Champion RC12YC
Spark Plug Gap, mm (in) ............ 0.762 (0.030)
Armature Air Gap, mm (in) ............ 0.20-0.30 (0.008-0.012)
Spark Plug Torque, Nm (lb-ft) ............ 23 (17.1)

Service Intervals

Service Air Filter Pre-Cleaner ............ Every 25 hrs
Clean Air Filter Cartridge ............ Every 25 hrs
Change Engine Oil ............ Every 50 hrs
Check and Adjust Spark Plug ............ Every 50 hrs
Change Engine Oil Filter ............ Every 100 hrs
Clean Cooling System ............ Every 100 hrs
Replace Air Cleaner Element ............ Every 100 hrs
Check Carburetor Adjustment ............ Every 100 hrs
Replace Spark Plug ............ Every 100 hrs
Check and Adjust Valve Clearance ............ Every 150 hrs

Briggs and Stratton 350447 Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Standard), mm (in) ............ 72.0-72.03 (2.835-2.836)
Cylinder Bore Inside Diameter (Maximum), mm (in) ............ 72.16 (2.839)
Main Bearing Bore Diameter (Cylinder Block), mm (in) ............ 35.02-35.06 (1.379-1.3805)
Main Bearing Bore Diameter (Crankcase Cover), mm (in) ............ 35.04-35.05 (1.3795-1.3801)
Camshaft Bearing Bore Diameter (Cylinder Block), mm (in) ............ 16.0-16.03 (0.630-0.631)
Camshaft Bearing Bore Diameter (Crankcase Cover), mm (in) ............ 20.0-20.02 (0.7875-0.7880)
Crank Pin Outside Diameter (Standard), mm (in) ............ 37.0-37.02 (1.4565-1.4575)
Crank Pin Outside Diameter (Wear Limit), mm (in) ............ 36.95 (1.455)
Crankshaft Journal Diameter (Magneto Side), mm (in) ............ 34.99-35.01 (1.3776-1.3784)
Crankshaft Journal Diameter (PTO Side), mm (in) ............ 34.96-34.97 (1.3765-1.3770)
Crankshaft End Play, mm (in) ............ 0.003-0.015 (0.08-0.40)
Camshaft Journal Diameter (Magneto Side), mm (in) ............ 15.95-15.97 (0.628-0.6287)
Camshaft Journal Diameter (PTO Side), mm (in) ............ 19.94-19.96 (0.7855-0.786)
Connecting Rod Big End Inside Diameter (Standard), mm (in) ............ 37.06-37.08 (1.459-1.460)
Connecting Rod Big End Inside Diameter (Wear Limit), mm (in) ............ 37.12 (1.4615)
Connecting Rod Small End Inside Diameter (Standard), mm (in) ............ 17.09-17.1 (0.6728-0.6735)
Connecting Rod Small End Inside Diameter (Wear Limit), mm (in) ............ 17.12 (0.674)

Cylinder Head and Valves

Cylinder Head (Max. Out of Flatness), mm (in) ............ 0.10 (0.004)
Intake Valve Clearance (Cold), mm (in) ............ 0.10-0.15 (0.004-0.006)
Exhaust Valve Clearance (Cold), mm (in) ............ 0.10-0.15 (0.004-0.006)
Valve Guide Inside Diameter (Standard), mm (in) ............ 6.01-6.02 (0.2365-0.2370)
Valve Guide Inside Diameter (Wear Limit), mm (in) ............ 6.05 (0.238)
Intake Valve Stem Outside Diameter (Standard), mm (in) ............ 5.95-5.96 (0.234-0.2346)
Intake Valve Stem Outside Diameter (Wear Limit), mm (in) ............ 5.92 (0.233)
Exhaust Valve Stem Outside Diameter (Standard), mm (in) ............ 5.94-5.95 (0.2338-0.2340)
Exhaust Valve Stem Outside Diameter (Wear Limit), mm (in) ............ 5.91 (0.2328)
Cam Lobe (Intake), mm (in) ............ 30.33-30.53 (1.194-1.202)
Cam Lobe (Exhaust), mm (in) ............ 30.33-30.53 (1.194-1.202)

Piston and Piston Rings

Piston Pin Outside Diameter (Standard), mm (in) ............ 17.07-17.08 (0.6722-0.6725)
Piston Pin Outside Diameter (Wear Limit), mm (in) ............ 17.06 (0.6718)
Piston Pin Bearing Diameter (Standard), mm (in) ............ 17.09-17.1 (0.6728-0.6735)
Piston Pin Bearing Diameter (Wear Limit), mm (in) ............ 17.12 (0.674)
Top Compression Ring Side Clearance (Standard), mm (in) ............ 0.045-0.076 (0.0018-0.003)
Second Compression Ring Side Clearance (Standard), mm (in) ............ 0.045-0.076 (0.0018-0.003)
Oil Ring Side Clearance (Standard), mm (in) ............ 0.11-0.15 (0.0045-0.006)
Top and 2nd Ring Side Clearance (Wear Limit), mm (in) ............ 0.10 (0.004)
Oil Ring Side Clearance (Wear Limit), mm (in) ............ 0.20 (0.008)
Top Compression Ring End Gap (Standard), mm (in) ............ 0.20-0.40 (0.008-0.016)
Second Compression Ring End Gap (Standard), mm (in) ............ 0.20-0.40 (0.008-0.016)
Oil Ring End Gap (Standard), mm (in) ............ 0.20-0.40 (0.008-0.016)
Piston Ring End Gap (Wear Limit), mm (in) ............ 0.76 (0.030)

Briggs and Stratton 350447 Tightening Torque Specs

Alternator (to cylinder), Nm (lb-ft) ............ 2 (1.5)
Air Cleaner Base (to carburetor), Nm (lb-ft) ............ 7 (5.2)
Air Cleaner Support Bracket, Nm (lb-ft) ............ 7 (5.2)
Armature, Nm (lb-ft) ............ 3 (2.2)
Back Plate, Nm (lb-ft) ............ 7 (5.2)
Blower Housing, Nm (lb-ft) ............ 7 (5.2)
Breather, Nm (lb-ft) ............ 3 (2.2)
Carburetor (to manifold), Nm (lb-ft) ............ 7 (5.2)
Connecting Rod, Nm (lb-ft) ............ 13 (9.6)
Crankcase Cover, Nm (lb-ft) ............ 17 (12.6)
Cylinder Head, Nm (lb-ft) ............ 19 (14.1)
Cylinder Shield, Nm (lb-ft) ............ 7 (5.2)
Exhaust Manifold, Nm (lb-ft) ............ 17 (12.6)
Fan Retainer, Nm (lb-ft) ............ 17 (12.6)
Flywheel, Nm (lb-ft) ............ 175 (129.6)
Governor Control Bracket, Nm (lb-ft) ............ 16 (11.9)
Governor Lever Nut, Nm (lb-ft) ............ 8 (5.9)
Intake Manifold, Nm (lb-ft) ............ 16 (11.9)
Oil Pump, Nm (lb-ft) ............ 7 (5.2)
Rewind Starter (to blower housing), Nm (lb-ft) ............ 7 (5.2)
Rocker Arm Lock Nut, Nm (lb-ft) ............ 7 (5.2)
Rocker Arm Stud, Nm (lb-ft) ............ 11 (8.2)
Spark Plug, Nm (lb-ft) ............ 23 (17.1)
Starter Motor, Nm (lb-ft) ............ 16 (11.8)
Starter Motor Thru Bolts, Nm (lb-ft) ............ 6 (4.4)
Valve Cover, Nm (lb-ft) ............ 3 (2.2)