Mercury Outboard Motors 70HP - 115HP Service Manual 1987-1993
Diagnostic procedures and component service for Mercury 70 HP, 75 HP, 80 HP, 90 HP, 100 HP, and 115 HP models (1987-1993). Includes diagnostic flowcharts. Ref: 90-13645-2
Manual Preview
Sample pages from the Mercury Outboard Motors 70HP - 115HP Service Manual 1987-1993 manual
Purchase & Download
Models Covered & Key Technical Specifications
Mercury 70 HP, 75 HP, 80 HP, 90 HP, 100 HP, 115 HP (90-13645--2) - 1987-1993
This is a comprehensive service manual covering Mercury outboard motors from 1987-1993.
- Designated Capacity: The fuel tank capacity is 6.6 U.S. Gallons for all models listed.
- Primary Specifications: Idle RPM is set between 650-700 in FORWARD gear across all listed models.
- Advanced Testing Procedures: Ignition timing can be adjusted via the trigger assembly position for optimal performance.
- Defined Compression Range: Cylinder bore is 3.375 inches (85.7mm) for 3-cylinder models and 3.375 inches (85.7mm) for 4-cylinder models.
- Key Performance Metrics: Full Throttle RPM Range is 4750-5250 RPM for most models, with 100 and 115 HP models reaching 5000-5500 RPM.
- Certified Lubrication: Engine weight varies from 260 lbs (ELO) to 360 lbs (ELOPT) depending on the specific model.
Professional Workshop Service Manual & Technical Specifications
Mercury 70 HP, 75 HP, 80 HP, 90 HP, 100 HP, 115 HP 1987-1993 - Comprehensive Outboard Service Manual Chassis-Documentation
| Specification | Rating | Calibration-Data |
|---|---|---|
| Model Coverage | 70, 75, 75 Marathon, 75XD, 75 Seapro, 80, 90 HP (1987-1993) and 100, 115 HP (4 Cylinder, 1988-1993) | Serial Numbers provided for United States, Belgium, and Canada |
| Engine Type | 3 Cylinder and 4 Cylinder, 2 Cycle | N/A |
| Ignition Type | C.D. Breakerless | N/A |
| Fuel Type | Regular Leaded, Premium, Low-Lead and Lead-Free automotive gasoline (86 octane minimum) | N/A |
| Oil Type | Quicksilver TC-WII or TC-W3 2-Cycle Outboard Oil | N/A |
Appropriately mandating precise engine maintenance, this manual details critical operational systems.
Maintenance hierarchies are structured into clear sections covering general information, electrical and ignition systems, fuel systems, oil injection, powerhead, and lower unit components.
Within the electrical and ignition sections, users will find in-depth coverage of stator tests, ignition coil diagnostics, and trigger adjustments. The fuel system chapters thoroughly document carburetor synchronization, fuel pump operation, and troubleshooting for various fuel-related issues.
The powerhead section provides detailed instructions for piston and ring installation, crankshaft procedures, and cylinder block maintenance. Lower unit service includes water pump repair, gear housing inspection, and propeller shaft reassembly. Torque specifications and special tools required for each procedure are clearly listed.
This manual documents torque specifications for critical engine components to ensure proper assembly and prevent structural misalignment prevention.
FAQ
Customer Reviews
Read what our customers say about this Mercury Outboard Motor manual and share your own experience.
Add a Review
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Reviews (5)