Product Manual
Table Of Contents
- Notice to Users of This Manual
- Precautions
- Replacement Parts
- Cleanliness and Care of Product
- Copyright and Trademark Information
- Manual Outline
- Section 1A - Specifications
- Table of Contents
- Model Specifications
- Ignition Specifications at 20 °C (68 °F)
- Charging and Starting Specifications
- Fuel System Specifications
- Cylinder Block/Crankcase Specifications
- Piston Specifications
- Cylinder Head Specifications
- Oil System Specifications
- Cooling System Specifications
- Power Tilt Specifications
- Gearcase Specifications
- Section 1B - Maintenance
- Table of Contents
- Cleaning Care
- Inspection and Maintenance Schedule
- Battery Inspection
- Flushing the Cooling System
- Fuel System
- Fuse Replacement - Electric Start Models
- Spark Plug Inspection and Replacement
- Timing Belt Inspection
- Engine Oil
- Corrosion Control Anodes
- Propeller Replacement
- Gearcase Lubrication
- Lubrication Points
- Storage Preparation
- Section 1C - General Information
- Table of Contents
- Recording Serial Number
- Model Year Production Code
- Engine Component Identification - Manual Start Model
- Engine Component Identification - Electric Start Model
- Following Complete Submersion
- Fuel Requirements
- Painting Procedures
- Emissions
- Shipping of Hazardous Material (HazMat) and Engine/Components Containing Hazardous Material
- Section 1D - Outboard Installation
- Section 1E - General Troubleshooting
- Table of Contents
- Conditions Affecting Performance
- Compression Check
- Cylinder Leakage Test
- Guardian Protection System
- Warning System
- Troubleshooting without a Computer Diagnostic System (CDS)
- Troubleshooting with CDS G3
- Accessing ECM Information with CDS G3
- CDS G3 Screens (10/15/20 EFI)
- Engine Control Module Pinout
- Fault Codes
- Section 2A - Ignition
- Table of Contents
- Ignition Specifications at 20 °C (68 °F)
- Ignition Theory of Operation
- General Troubleshooting
- Engine Control Module (ECM)
- Wire Color Code Abbreviations
- Sensors
- Ignition Components
- Section 2B - Charging and Starting Systems
- Section 3A - Fuel System Operation
- Section 3B - Troubleshooting and Diagnostics
- Section 3C - Service Procedures
- Section 4A - Cylinder Block/Crankcase
- Table of Contents
- Cylinder Block/Crankcase Specifications
- Piston Specifications
- Cylinder Block and Crankcase Components
- Crankshaft Components
- Powerhead Removal
- Cylinder Block Disassembly
- Powerhead Cleaning, Inspection, and Repair
- Powerhead Assembly
- Powerhead Installation
- Section 4B - Cylinder Head
- Section 4C - Oil Pump
- Section 4D - Cooling System
- Section 5A - Clamp/Swivel Bracket and Driveshaft Housing
- Table of Contents
- Clamp Bracket Components (Power Tilt)
- Clamp Bracket Components (Manual Tilt)
- Steering Arm and Copilot Components
- Driveshaft Housing Components
- Driveshaft Housing Cover Components
- Driveshaft Housing Covers
- Front Cowl
- Idle Exhaust Port Cover
- Powerhead/Midsection Assembly Separation
- Engine Mount Replacement
- Clamp Brackets, Swivel Bracket - Power Tilt Models
- Clamp Brackets, Swivel Bracket - Manual Tilt Models
- Driveshaft Housing Removal
- Driveshaft Housing Installation
- Shift Operation
- Kicker Strap (Tiller Handle Model)
- Section 5B - Power Tilt
- Table of Contents
- Power Tilt Specifications
- General Troubleshooting
- Power Tilt - General Information
- Power Tilt Components
- Theory of Operation
- Power Tilt Features and Operation
- Check Fluid and Purge the Power Tilt System
- Cowl-Mounted Tilt Switch
- Troubleshooting the Power Tilt System
- Power Tilt Removal
- Manual Release Valve Removal and Repair
- Power Tilt Motor
- Power Tilt Pump
- Power Tilt Installation
- Section 6A - Gear Housing (2.15:1)
- Table of Contents
- Gearcase Specifications
- Gear Housing and Driveshaft
- Propeller Shaft
- General Service Recommendations
- Draining and Inspecting Gear Housing Lubricant
- Gear Housing Removal
- Gear Housing Disassembly
- Gear Housing Assembly
- Pinion Bearing Installation
- Forward Gear Bearing Installation
- Bearing Carrier Assembly
- Water Pump Base Assembly
- Propeller Shaft Assembly
- Pinion Gear and Driveshaft Installation
- Forward Gear Backlash
- Shift Shaft and Water Pump Base Installation
- Water Pump Cover Assembly
- Propeller Shaft and Bearing Carrier Installation
- Gear Housing Installation
- Propeller Installation
- Section 7A - Throttle and Shift Linkage
- Section 7B - Tiller Handle
- Section 8A - Recoil Starter
- Section 9A - Color Diagrams
Tube Ref No. Description Where Used Part No.
81
Anti-Seize Compound Spark plug threads 92-898101389
• Add Quickleen to the fuel tank.
Tube Ref No. Description Where Used Part No.
Quickleen Engine & Fuel
System Cleaner
Fuel tank 8M0047931
• Check the cowl seals to ensure that the seals are intact and not damaged.
•
Check that the idle relief muffler is in place, if equipped.
• Inspect the thermostat for corrosion or a broken spring. Verify the thermostat closes completely at room temperature.
• Check the mounting fasteners that secure the outboard to the boat transom. Tighten the fasteners to the specified torque.
Refer to Section 1D ‑ Installing Outboard on Transom.
• Check the tightness of screws, nuts, and other fasteners.
• Check for loose hose clamps and rubber boots on the air intake assembly.
• Lubricate the driveshaft splines with Extreme Grease.
Tube Ref No. Description Where Used Part No.
Extreme Grease Driveshaft splines 8M0071842
Every 300 Hours of Use or Three Years
• Tiller handle models: Lubricate the throttle cable barrels and the shift cable rod end with 2‑4‑C with PTFE.
Tube Ref No. Description Where Used Part No.
95
2-4-C with PTFE Throttle cable barrels and the shift cable rod end 92-802859A 1
• Verify the throttle and shift cables are properly adjusted.
•
Lubricate all lubrication points. Lubricate more frequently when used in saltwater. Refer to Lubrication Points.
•
Replace the spark plugs. Refer to Spark Plug Inspection and Replacement.
•
Check the remote control cable adjustment, if applicable.
• Inspect the timing belt.
• Lubricate the splines on the upper driveshaft.
• Inspect the wiring and connectors.
• Replace the water pump impeller.
NOTE: Replace the water pump impeller more often, if overheating occurs or reduced water pressure is noted.
Before Periods of Storage
Refer to Storage Preparation.
Battery Inspection
The battery should be inspected at periodic intervals to ensure proper engine starting capability.
IMPORTANT: Read the safety and maintenance instructions which accompany your battery.
1. Turn off the engine before servicing the battery.
2. Ensure the battery is secure against movement.
3. Battery cable terminals should be clean, tight, and correctly installed. Positive to positive and negative to negative.
4. Ensure the battery is equipped with a nonconductive shield to prevent accidental shorting of battery terminals.
Flushing the Cooling System
!
WARNING
Rotating propellers can cause serious injury or death. Never operate the boat out of the water with a propeller installed.
Before
installing or removing a propeller, place the drive unit in neutral and engage the lanyard stop switch to prevent the
engine from starting. Place a block of wood between the propeller blade and the anti‑ventilation plate.
Maintenance
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 1B-3