Suzuki DT115/DT140 Outboard Motor Service Manual

1983–1985 Suzuki DT115 and DT140 Technical Scope

• Covers 1983–1985 Suzuki DT115 and DT140 2-stroke outboard motors, including specific commercial variant tuning and standard power-trim-and-tilt configuration details
• Official Suzuki publication P/N 32102-94500, first edition for 1983–1985 model production run
• Contains 101 exploded-view component diagrams and 18 specialized technical torque tables
• File delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Laid out for standard letter and A4 printing
• This 138-page manual provides the factory specifications and adjustment procedures necessary to verify component tolerances for the 1773cc 4-cylinder block and gearcase assembly

Technical Walkthrough and Content Scope

The 1983–1985 Suzuki DT115 and DT140 service manual organizes the outboard motor into 14 distinct technical groups. Documentation begins with the main specifications, detailing performance parameters such as the 5000–5500 rpm operating range and the specific cylinder-to-piston clearance tolerances of 0.08–0.09 mm. Detailed instructions cover the removal, disassembly, and reassembly of the power head, including the crankshaft, pistons, and reed valve induction system. Further sections document the fuel system, specifically the oil injection circuit and the 1773cc carburetor tuning requirements.

Specification and Reference Values

This manual provides comprehensive technical depth, including critical torque values for internal components. The cylinder head bolt torque is specified at 40.0–60.0 Nm, while the flywheel nut is documented at 240–260 Nm. The factory workshop documentation structure outlines the proper shim selection procedure for the transmission gears to achieve the correct tooth contact pattern. Specific fluid capacities are included, such as the 1100 ml lower unit gear oil requirement. The ignition system data section provides resistance values for the primary coil (0.20–0.29 ohms) and secondary coil (2200–2900 ohms), facilitating precise magneto testing. Reference values for trolling speed (600–700 rpm) and thermostat opening temperatures are included to assist in engine diagnostic verification.

Reference only — always consult a certified technician before performing service on this equipment.

An official 138-page Suzuki OEM workshop manual covering the 1983–1985 DT115 and DT140, documenting engine, gearcase, electrical, and cooling system specifications for the 1773cc 4-cylinder outboard motor series.