Onan Gasoline Engine Service Manual (16, 18, 20 & 24HP) - John Deere

Technical Scope for John Deere 16–24HP Onan Engine Manual

• Built for owners and technicians servicing the 16, 18, 20, and 24 HP John Deere Onan Engines (models B43E, B43G, B48G, P218G, P220G, and T260)
• Official John Deere publication CTM2, latest revision data included
• Contains 56 individual diagrams including component exploded views, torque-sequence illustrations, and engine application charts
• Delivered as a direct download the moment payment clears
• OCR text layer lets you jump to a torque spec by keyword
• Suitable for printing individual sections for shop-floor use
• Permanent availability in your purchase account — no re-buy required
• This technical manual provides the factory-recommended repair procedures for engine components including air cleaner assemblies, cylinder heads, intake manifolds, valves, and pistons
• Only edition that explicitly distinguishes the T260 engine service procedures from the standard B43/P218 variant assembly instructions

Engine Service and Component Walkthrough

This John Deere 16–24HP Onan engine manual covers technical procedures for the overhaul and maintenance of two-cylinder, four-cycle power units. The documentation provides clear direction on removing and installing engine components while emphasizing diagnostic analysis and testing. Topics include air cleaner/breather maintenance, intake manifold service, cylinder head removal, valve train work, flywheel assembly, and camshaft repair. The structure of factory workshop documentation is preserved here to guide experienced service technicians through teardown and reassembly routines using standard tool sets.

Specification and Torque Data Preview

Engine specifications are documented for models B43E, B43G, B48G, P218G, P220G, and T260, including detailed displacement and bore/stroke charts. Torque values for critical fasteners, such as cylinder head nuts and flywheel cap screws, are provided to ensure correct assembly. The manual lists intake valve clearance at 0.13 mm and exhaust valve clearance at 0.33 mm. Camshaft gear backlash for the B43E/G and B48G models is specified at 0.03–0.15 mm. Connecting rod cap nut torque is listed at 18 ± 1 N·m for most models, while T260 cap screws require 20 ± 1 N·m. Reference only — always consult a certified technician before performing service on this equipment. This official John Deere publication provides maintenance and repair data for the 16–24HP Onan engine series, covering cylinder block internals, fuel system components, and valve timing specifications for the CTM2 series build.