2000 Mercury Optimax 115 / 135 / 150 / 175 Service Manual

Covers Optimax models with detailed procedures for fuel delivery, ignition timing, and starting systems. Includes component part numbers and diagnostic guidance. Ref: 90-859494R1

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Document Details

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Document Number / Seller:
25410 / Karen Mason
File Size:
24.80 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Outboard Motor
Last updated / verified
Feb 20, 2025

Models Covered & Key Technical Specifications

2000 Mercury Optimax 115 / 135 / 150 / 175 Service Manual: Mercury Outboard 2000 Optimax Service Manual Troubleshooting-Index 2000 Mercury Optimax 115 / 135 / 150 / 175 (90-859494R1) — 2000 Engineering & Technical Reference | Optimax Service Repository.

  • Prescribed Cycle Rate: 5500 rpm maximum is specified as the upper throttle governor setting for the 115 and 135 horsepower configuration Bounds.
  • Measured Rotation Data: For optimal engine performance, 5750 rpm is the rated high-speed limiting threshold for 150 and 175 horsepower models Topology.
  • Core Installation Footprint: The air compressor displacement reaches 7.07 cu. in. (116 cc) with reciprocal piston rotation Matrix.
  • Rated Threaded Fastener Data: The cylinder head assembly requires 30 lb-ft (41 Nm) initial torque then 90 degrees additional turn Standards.
  • Technical Alignment Specs: Fuel pressure maintains 89 ± 2 psi (613.5 ± 13.8 kPa) against air pressure set to 79 ± 2 psi (544.0 ± 13.8 kPa) Margin.
  • Advanced Output Performance: Maximum direct fuel injection discharge achieves 175 horsepower (130.5 kW) at stoichiometric 10 psi differential Protocol.

Professional Workshop Service Manual & Technical Specifications

Specialized Performance Shop Manual: Outboard Motor 2000 Mercury Optimax 115 / 135 / 150 / 175 Service Manual Troubleshooting-Index

Engine-Type: Mercury Optimax // Unit-Designations: 115/135/150/175 HP Outboard Engines // Engine-Type: Marine Direct Fuel Injection

Engine Performance Specifications

Performance-Element Operational-Logic Calibration-Spec
Horsepower 115 - 175 HP N/A
Full Throttle RPM 5000 - 5750 RPM N/A
Idle RPM 550 ± 25 RPM N/A
Cylinder Bore 3.501 in. (88.925 mm) N/A
Stroke Length 2.65 in. (67.3 mm) N/A
Piston Diameter 3.4925 in. ± .0005 in. N/A

Fundamentally requiring adherence to precise service intervals and specifications, this manual details the complete operational framework for Mercury Optimax outboard motors. It covers all essential systems, from ignition and fuel delivery to cooling and electrical components, ensuring optimal performance and longevity. Its structured approach facilitates efficient diagnostics and repairs, aligning with factory standards for engine maintenance.

System operation descriptions cover fuel delivery and air intake systems. This manual details the components within the fuel system, including the high and low pressure pumps, injectors, and associated regulators, ensuring a clear understanding of their function and maintenance requirements.

The documentation addresses the ignition system thoroughly, covering coils, coil drivers, crank position sensors, and throttle position sensors to guarantee accurate spark delivery and timing.

Assembly instructions are detailed for critical components such as the powerhead, mid-section, and gear housing, providing step-by-step guidance for correct installation and reassembly.

Hydraulic schematics are included for power trim and steering systems, crucial for maintaining control and maneuverability of the outboard.

Steering component information is provided for proper adjustment and maintenance, ensuring responsive and safe operation under various conditions.

This manual documents torque specifications for critical fasteners to ensure proper assembly and prevent fastener fatigue prevention. It provides comprehensive guidance for maintaining the integrity and performance of the Mercury Optimax engine.

FAQ

What **calibrated** values are required for the system architecture? keyboard_arrow_down

2.5591 in. (65.0 mm) cylinder bore diameter is specified for the air compressor, and it requires 0.001 in. (0.025 mm) for taper/out-of-round/wear maximum.

Assess the **applicable** tool requirements for testing the system. keyboard_arrow_down

A Dual Fuel/Air Pressure Gauge (160 psi) – 91-852087A1/A2/A3, along with 2 Adaptors (91-803804A2) for a pressure gauge set, are required for system testing.

What **exact** electrical values are documented for the ignition system components? keyboard_arrow_down

4.0 – 4.7 VDC is the documented idle specification for the throttle position sensor, with 0.4 – 1.3 VDC specified for wide open throttle.

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Reviews (3)

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I had a question about the manual and received a quick response from customer support. The download process was smooth too!
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The manual has everything I needed to service my outboard motor. The troubleshooting section was particularly helpful!
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Rated 5 out of 5 stars