Part of the Yanmar Repair Manuals.
Milky oil in the reservoir of a Yanmar ZT350 means water is getting past a seal somewhere, and finding which one means pulling the drive off the transom the right way. This service manual (Yanmar publication 0BZTD-G00100) walks the whole stern drive end to end: removal and installation from the transom assembly, driveshaft housing teardown, gear housing disassembly and inspection, gimbal housing work, shift cable installation and adjustment, power steering, the power trim system, propellers, and corrosion protection.
Across 333 pages you get part diagrams, disassembly and assembly sequences, tightening torques, special service tools, and a dedicated troubleshooting chapter covering stern drive, performance, power steering, and power trim faults.
It is a downloadable PDF in English, so you can keep it on a laptop at the dock or print just the section you need and let those pages get greasy while the drive is apart.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 10-11 | Revision History |
| Safety | 12-17 | Crush Hazard, Fire and Explosion Hazard, Electrical Hazard, Exhaust Hazard, Entanglement Hazard, Lifting Hazard |
| General Service Information | 18-47 | Responsibilities (Owner / Operator Responsibilities, Dealer / Distributor Responsibilities), Specifications, Identification (Transom Assembly, Stern Drive Assembly) |
| Maintenance | 48-71 | Safety Precautions, Checking, Filling and Changing Stern Drive Oil (Checking Stern Drive Oil Reservoir Level), Checking and Filling Power Trim Pump Fluid |
| Stern Drive | 72-91 | Safety Precautions, Component Identification, Stern Drive Removal From Transom Assembly, Stern Drive Installation to Transom Assembly, Stern Drive Driveshaft Alignment |
| Driveshaft Housing | 92-137 | Safety Precautions, Driveshaft Housing Part Diagrams (Driveshaft Housing and Drive Gear, Universal Joint and Clutch, Case Plate and Shifter), Driveshaft Housing Disassembly |
| Gear Housing | 138-195 | Safety Precautions, General Views, Gear Housing Part Diagrams, Disassembly and Inspection, Gear Housing Assembly |
| Transom Assembly | 196-261 | Safety Precautions, General Views, Transom Assembly Part Diagrams, Gimbal Housing Disassembly, Gimbal Housing Assembly, Tilt-Up Limit Spacer, Speedometer Connection |
| Shift Cable | 262-273 | Safety Precautions, Control Cables, Shift Cable Installation and Adjustment |
| Steering | 274-285 | Safety Precautions, Power Steering Unit Parts Diagram, Steering Cable Specifications, Installation of Steering Cable, Connecting Steering Cables, Power Steering Unit Installation |
| Power Trim System | 286-297 | Safety Precautions, Power Trim Pump Parts Diagram, Power Trim Cylinders Parts Diagram, Power Trim Pump Fluid, Power Trim Cylinders, Power Trim Troubleshooting |
| Propellers | 298-309 | Safety Precautions, Propeller Selection, Propeller Installation, Removing Propellers |
| Corrosion Protection | 310-319 | Safety Precautions, Corrosion Control Parts Diagram, Galvanic Corrosion, Corrosion Control, Shore Power, Underwater Drive Coating, Additional Protection |
| Troubleshooting and Testing | 320-333 | Safety Precautions, Stern Drive Unit Troubleshooting, Performance Troubleshooting, Power Steering Troubleshooting, Power Trim System Troubleshooting, Stern Drive Testing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Front Propeller Nut Torque | 135 N·m (99 lb-ft) | p. 308 |
| Maximum Input Speed | 4500 rpm | p. 21 |
| Dry Mass (Weight) | 100 kg | p. 21 |
| Standard Bolt M12 Torque | 43-47 N·m | p. 24 |
| Transom Assembly Hinge Bolt M16 Torque | 130-140 N·m | p. 25 |
| Stern Drive Assembly Universal Joint Nut M20 Torque | 190-210 N·m | p. 25 |
| Propeller Nut Outer Torque | 130-140 N·m | p. 25 |
