BRIGGS & STRATTON CORPORATION ADVANCE PRODUCT SERVICE INFORMATION APSI NO: DATE: SUBJECT: 76 05/01/2011 INTRODUCTION OF MODEL 490000 COMMERCIAL TURF SERIES AND PROFESSIONAL SERIES MODELS: 810 cc 49G500 / 49L900 / 49M700 / 49M800 / 49M900 Briggs & Stratton has recently introduced the model 490000 Commercial Turf and engines. This APSI provides basic servicing information in advance of the repair manual currently in development. System tests and component removal and installation procedures are common with most other Briggs & Stratton engines. See the Illustrated Parts List for service part numbers. The specifi cations, part numbers, and/or procedures provided are PRELIMINARY and subject to change. Model 490000 (Cyclonic) Model 490000 (Also available in Gaseous Fuel) Model 490000 Commercial Turf (Cyclonic) Briggs & Stratton Corp. Page 1 of 7
Dimensions - Model 490000 Commercial Turf and - Cyclonic Air Cleaner Ŋ (444.50) Ŋ (392.94) Ŋ (392.94) du ct io n Ŋ (460.50) R ep ro Ŋ (484.39) Fo r Dimensions - Model 490000 - Flat Panel Air Cleaner N ot Ŋ (454.7) Ŋ (484.1) Ŋ (380.0) Page 2 of 7
Static Governor Adjustment Procedure 1. Loosen the governor lever nut (A). 2. Rotate the governor lever (B) to the right or clockwise as far as it will go so that the throttle shaft is in the wide open position. 3. Rotate the governor shaft (C) clockwise as far as it will go and hold the lever and shaft in this position. 4. Torque the governor lever nut to 100 lb-in (11.3 Nm). B C A Page 3 of 7
Cyclonic Air Filter Service Procedure 1. Loosen the fasteners and remove the air fi lter cover (A). 2. Loosen the screws and remove the debris guards (B). 3. Wearing safety glasses and BEFORE removing/replacing the air fi lter, blow out any debris around the cylinders. 4. Reinstall the debris guards. Torque the screws to 20 lb-in (2.3 Nm). 5. Open the latch (C) and remove the air fi lter. 6. To loosen debris, gently tap the air fi lter on a hard surface. If the air fi lter is excessively dirty, replace with a new air fi lter. 7. Install the air fi lter and close the latch. 8. Install the cover and torque the screws to 15 lb-in (1.7 Nm). B C B A Page 4 of 7
Fastener Torque Specs Commercial Turf & Cyclonic Air Filter Gaseous Fuel SAE Metric SAE Metric SAE Metric Air Cleaner Cover 15 lb-in 1.7 Nm 15 lb-in 1.7 Nm 15 lb-in 1.7 Nm Air Filter Spring Tab Air Guide Valley Cover 30 lb-in 3.4 Nm N/A N/A N/A N/A 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm Alternator 22 lb-in 2.5 Nm 22 lb-in 2.5 Nm 22 lb-in 2.5 Nm Armature 25 lb-in 2.8 Nm 25 lb-in 2.8 Nm 25 lb-in 2.8 Nm Backplate to Cylinder Common Specifications SAE Metric Armature Air Gap.008 -.012 in.20 -.30 mm Common Service Parts Bolt Circle (1) 10.000 in 254.00 mm Bore and Stroke 3.300 x 2.890 in 83.82 x 73.41 mm Compression Ratio 8:4:1 8:4:1 Crankshaft End Play.002 -.030 in.05 -.76 mm Displacement 49.42 c.i. 810 cc Exhaust Valve Clearance-Gasoline (Cold).004 -.006 in.10 -.15 mm Intake Valve Clearance- Gasoline (Cold).004 -.006 in.10 -.15 mm Exhaust Valve Clearance-Gaseous (Cold).009 -.011 in.23 -.28 mm Intake Valve Clearance- Gaseous(Cold).009 -.011 in.23 -.28 mm Oil Capacity 68 oz. 2.0 L Spark Plug Gap (Gasoline).030 in.76 mm Spark Plug Gap (Gaseous).020 in.51 mm Service Number Commercial Turf & Cyclonic Air Filter Service Number - Service Number Gaseous Fuel Air Cleaner Gasket 691001 691001 798751 Air Cleaner Knob 790697 790697 790697 Air Filter 798897 792105 798748 Armature 691060 691060 691060 Carburetor 799511 796870 798761 Crankcase Cover Gasket 697227 697227 697227 Cylinder Head Gasket 796851 796851 796851 Electric Starter 799106 795121 795121 Engine Gasket Set 799117 799117 798753 Flywheel Puller 19203 19203 19203 Intake Gasket 690949 690949 690949 Intake Gasket 798759 798759 798759 Spark Plug (Resistor) 491055 491055 692051 Spark Plug (EMS) N/A 793541 N/A Spark Plug Wrench 19576 19576 19576 Valve Gasket Set 694013 796920 798754 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm Blower Housing 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm Page 5 of 7
Fastener Torque Specs Blower Housing to Air Cleaner Base Blower Housing to Intake Elbow Commercial Turf & Cyclonic Air Filter Gaseous Fuel Oval Air FIlter 35 lb-in 4.0 Nm N/A N/A N/A N/A 25 lb-in 2.8 Nm 25 lb-in 2.8 Nm 25 lb-in 2.8 Nm Breather Cover 55 lb-in 6.2 Nm 55 lb-in 6.2 Nm 55 lb-in 6.2 Nm Connecting Rod 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm Control Bracket 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm Crankcase Cover 200 lb-in 22.6 Nm 200 lb-in 22.6 Nm 200 lb-in 22.6 Nm Cylinder Head 250 lb-in 28.2 Nm 250 lb-in 28.2 Nm 250 lb-in 28.2 Nm Cylinder Shield 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm Cyclonic Elbow 20 lb-in 2.3 Nm N/A N/A N/A N/A Debris Guard to Blower Housing EFM to Cylinder Shield 20 lb-in 2.3 Nm N/A N/A N/A N/A 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm 45 lb-in 5.1 Nm Flywheel Fan 80 lb-in 9.0 Nm 80 lb-in 9.0 Nm 80 lb-in 9.0 Nm Flywheel Nut 140 ft-lb 189.8 Nm 140 ft-lb 189.8 Nm 140 ft-lb 189.8 Nm Fuel Pump 15 lb-in 1.7 Nm 15 lb-in 1.7 Nm 15 lb-in 1.7 Nm Governor Lever Nut Intake Manifold Assy. Oil Cooler Assy.to Engine Sump Oil Cooler to Cylinder Shield Oil Cooler to Blower Housing Oil Cooler to Bracket 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 450 lb-in 610.1 Nm 450 lb-in 610.1 Nm 450 lb-in 610.1 Nm N/A N/A 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm 20 lb-in 2.3 Nm N/A N/A N/A N/A 65 lb-in 7.3 Nm 65 lb-in 7.3 Nm 65 lb-in 7.3 Nm Oil Drain Plug 125 lb-in 14.1 Nm 125 lb-in 14.1 Nm 125 lb-in 14.1 Nm Oil Filter 75 lb-in 8.5 Nm 75 lb-in 8.5 Nm 75 lb-in 8.5 Nm Oil Pressure Switch 90 lb-in 10.2 Nm 90 lb-in 10.2 Nm 90 lb-in 10.2 Nm Oil Pump Cover 80 lb-in 9.0 Nm 80 lb-in 9.0 Nm 80 lb-in 9.0 Nm Post (rotating screen) to Flywheel 130 lb-in 14.7 Nm N/A N/A N/A N/A Rocker Arm Stud 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm Rocker Arm Nut 75 lb-in 8.5 Nm 75 lb-in 8.5 Nm 75 lb-in 8.5 Nm Rocker Cover 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm 100 lb-in 11.3 Nm Rotating Screen N/A 4.5 Nm 40 lb-in 4.5 Nm 40 lb-in 4.5 Nm Rotating Screen (Metal) to Flywheel post 85 lb-in 9.6 Nm N/A N/A N/A N/A Sparkplug 180 lb-in 20.3 Nm 180 lb-in 20.3 Nm 180 lb-in 20.3 Nm Starter Motor 140 lb-in 15.8 Nm 140 lb-in 15.8 Nm 140 lb-in 15.8 Nm Static Screen 25 lb-in 2.8 Nm N/A N/A N/A N/A Voltage Regulator 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm 85 lb-in 9.6 Nm Page 6 of 7
Dimensions Standard Dimensions Reject Dimensions SAE Metric SAE Metric Cylinder Mag Bearing 1.536 in 39.01 mm 1.539 in 39.19 mm Cam Bearing.501 in 12.73 mm.502 in 12.75 mm Bore Out-of Round N/A N/A.0015 in.04 mm Cylinder Head Intake Valve Seat Angle 60 N/A N/A N/A Valve Stem.235 in 5.60 mm.233 in 5.92 mm Valve Guide.238 in 6.04 mm.240 in 6.01 mm Exhaust Valve Seat Angle 60 N/A N/A N/A Valve Stem.235 in 5.60 mm.233 in 5.92 mm Valve Guide.238 in 6.04 mm.240 in 6.01 mm Crankcase Cover/Sump PTO Bearing 1.627 in 41.32 mm 1.629 in 41.48 mm Oil Seal Depth.190 in 4.82 mm N/A N/A Cam Bearing.501 in 12.73 mm.501 in 12.75 mm Crankshaft Crankpin Journal 1.499 in 38.17 mm 1.497 in 38.02 mm Mag Journal 1.378 in 35.00 mm 1.376 in 34.05 mm PTO Journal 1.625 in 41.36 mm 1.623 in 41.22 mm Cam Shaft Mag-Side Journal.500 in 12..70 mm.499 in 12.77 mm PTO-Side Journal.500 in 12.70 mm.499 in 12.77 mm Connecting Rod Crankpin Bearing 1.500 in 38.10 mm 15.01 in 38.13 mm Piston Pin Bearing.673 in 17.19 mm.675 in 17.15 mm Piston Pin Diameter.672 in 17.17 mm.671 in 17.04 mm Pin Bore.673 in 17.19 mm.675 in 17.15 mm Piston Rings End Gap-Top.004-.010 in.102 -.254 mm.020 in.508 mm End Gap-Middle.014-.022 in.466-.669 mm.035 in.999 mm End Gap-Oil.010-.030 in.354 -.862 mm.045 in 1.14 mm Ring Land Clearance - Top.002-.003 in.151-.186 mm.005 in.13 mm Ring Land Clearance -.002-.003 in.151-.186 mm.005 in.13 mm Middle Ring Land Clearance - Oil.002-.003 in.151-.186 mm.007 in.18 mm BRIGGS & STRATTON CORPORATION Distribution Sales & Customer Support Page 7 of 7