Part of the John Deere Repair Manuals.
A mower that surges under load and dies at the end of the yard usually comes down to governor linkage or a carburetor nobody has touched in years. The John Deere JS25, JS35, JS45 technical manual PDF, 158 pages published under OEM number TM103619, is the factory book for these walk-behind rotary mowers. Engine work fills the bulk of it, two separate sections covering cooling, crankcase breather, lubrication, compression release, carburetor and governor operation for the JS25 and JS35 together, then the JS45 alone. Wire color codes and electrical schematics let you trace the ignition circuit, electric starter and stator output, with troubleshooting charts near the front. Set your governed speed at 3400 plus or minus 100 rpm, then torque the wheel nuts to 28.5 N-m (21 lb-ft). One missing number stops a Saturday repair cold. Bookmarked and searchable, it prints clean, so the pages can get greasy on the bench.
What's Inside This John Deere JS25, JS35, JS45 Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Manual | 1-2 | Walk-Behind Rotary Mowers, Technical Specifications, Maintenance Procedures, Repair Instructions, Diagnostic Charts |
| Introduction | 3-4 | Manual Description, Product Support Program, Identification Numbers, Component Location, Theory of Operation |
| Safety | 5-8 | |
| Specifications and Information | 9-16 | Fastener Torques, Gasoline Storage, Engine Oil, Lubricant Storage, Serial Number Locations |
| Engine JS25 and JS35 | 17-64 | Cooling System, Crankcase Breather System, Lubrication System, Compression Release System, Carburetor, Governor Operation |
| Engine JS45 | 65-104 | Cooling System, Crankcase Breather System, Lubrication System, Compression Release System, Carburetor, Governor Operation |
| Electrical | 105-126 | Diagnostic Information, Wire Color Codes, Electrical Schematics, Ignition Circuit, Electric Starter, Stator Output |
| Power Train | 127-142 | Traction Drive System, Drive Belt, Transaxle, Ground Speed Adjustment, Drive Cable, Drive Axle |
| Miscellaneous | 143-152 | Front Wheel Removal, Rear Wheel Removal, Wheel Bearing Inspection, Front Axle Replacement, Blade Assembly Removal, Handle Assembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wheel Mounting Nuts Torque | 28.5 N•m (21 lb-ft) | p. 141 |
| Front Wheel Nut/Bolt Torque | 28.5 N•m (21 lb-ft) | p. 141 |
| Rear Wheel Nut Torque | 28.5 N•m (21 lb-ft) | p. 141 |
| JS25, JS35 | ||
| Engine Governed Speed | 3400 ± 100 rpm | p. 19 |
| Oil Capacity | 0.6 L (20 U.S. oz) | p. 19 |
| Spark Plug Gap | 0.076 mm (0.030 in.) | p. 19 |
| JS45 | ||
| Engine Governed Speed | 3400 ± 100 rpm | p. 67 |
| Oil Capacity | 0.65 L (22 U.S. oz) | p. 67 |
| Spark Plug Gap | 0.51 mm (0.020 in.) | p. 67 |
