Part of the Yanmar Operator Manuals.
A ZT370 that shifts late or trims slow usually comes down to something a daily check would have caught: gear oil a little low, trim pump fluid down, an anode half gone. This operator manual for the Yanmar ZT370 stern drive is where those checks live, along with the numbers that stop a job halfway: propeller nut torque, oil capacity, anode replacement limits.
Its 60 pages cover safety, component identification and serial number locations, corrosion protection, propeller selection and installation, daily checks, the periodic maintenance table and procedures, troubleshooting for the remote control, shift linkage, steering and power trim, long term storage, and full specifications, all as Yanmar publication 0AZTD-EN0022, in English.
The download is a bookmarked PDF of 8.19 MB. Print the maintenance table and the torque pages and let them get greasy at the transom; the clean copy stays on your laptop.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| English | 1-2 | |
| Introduction | 5-6 | Record of Ownership |
| Safety | 7-12 | Safety Precautions (Before You Operate, During Operation and Maintenance) |
| Product Overview | 13-24 | Overview (Owner/Operator Responsibilities, New Stern-Drive Break-In, Dealer/Distributor Responsibilities), Component Identification, Location of Serial Numbers |
| Stern-Drive Operation | 25-32 | Propeller Selection, Installing the Propellers, Removing the Propeller, Daily Checks (Visual Checks, Check the Stern-Drive Oil Level, Check the Power Trim Pump Fluid) |
| Maintenance | 33-52 | Periodic Maintenance (Importance of Periodic Maintenance, Performing Periodic Maintenance, Importance of Daily Checks, Yanmar Replacement Parts, Tools Required, Ask Your Authorized Yanmar Marine Dealer or Distributor for Help) |
| Troubleshooting | 53-54 | Remote Control, Shift and Throttle Linkages, Steering System, Power Steering Pump Fluid, Power Trim System, Gimbal Ring |
| Long-Term Storage | 55-56 | Cold Weather, Seasonal and Extended Storage (Stern-Drive: Lay Up, Recommissioning) |
| Specifications | 57-60 | Reduction Ratio, Propeller, Oil, Clutch System, Shift Type, Anti-Corrosion System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| O-ring replacement | Use new O-ring seals each time the drive unit is installed | p. 49 |
| Propeller shaft anode bolt torque | 30 N-m | p. 28 |
| Bolt for anode of cylinder part torque | 3.5 ± 0.5 N-m | p. 35 |
| Y-CaPS in-line fuse | 20 A | p. 23 |
| Stern-Drive Oil Capacity | 2.5 l (84.5 oz) | p. 57 |
| Maximum Input Speed | 4500 min-1 (rpm) | p. 57 |
| Steering Angle | 2 × 30 degrees | p. 57 |
| Tilt Angle | 51 degrees | p. 57 |
| Trim Zone | -6 to 10 degrees | p. 57 |
| Front Propeller Nut Torque | 135 N-m (99 lb-ft) | p. 28 |
| Rear Propeller Nut Torque | 80 N-m (59 lb-ft) | p. 28 |
| Gimbal Ring Locknut Torque | 50 N-m (37 lb-ft) | p. 42 |
