Yamaha 1996 75 HP Outboard Specs & Maintenance
The 1996 75 HP 3-cylinder 2-stroke outboard is a legendary workhorse, renowned for delivering reliable mid-range power and excellent torque-to-weight performance. Featuring a robust 70 cubic inch (1140 cc) inline design, this engine remains a favorite among DIY marine mechanics restoring mid-sized runabouts and fishing boats. Whether you’re troubleshooting ignition issues or performing routine service, our database provides the factory specs and guidance to keep this classic running strong.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 75 |
| Year Range | 1996 |
| Engine Type | IL 2-stroke |
| Cylinders | 3 |
| Displacement | 70 cu-in (1140 cc) |
| Bore x Stroke | 3.23 x 2.83 in (82 x 72 mm) |
| Compression Ratio | |
| Full Throttle RPM | 4500-5500 |
| Idle Speed (Neutral) RPM | 750-850 |
| Idle Speed (Trolling) RPM | 550-650 |
| Spark Plug (NGK) | B8HS-10 |
| Spark Plug (Champion) | L78C |
| Spark Plug Gap | 0.035-0.039 in (0.9-1.0 mm) |
| Ignition System | |
| Ignition Timing (Idle) | 7-9 ATDC |
| Ignition Timing (Carb Pickup) | 7-9 ATDC |
| Ignition Timing (Full Advance) | 19-21 |
| Fuel System | Carb |
| Starting System | Manual and/or Elec |
| Oil Injection System | PB or 50:1 PM |
| Injection Oil Ratio | PB or 50:1 PM |
| Gear Oil Capacity (mL/cc) | 610 |
| Gear Oil Capacity (Oz) | 20.6 |
| Approximate Weight | 242-277 lbs (110-126 kg) |
| Battery CCA / Reserve | 380 (70) |
| Battery Reserve | 124 minutes |
| Tach Pole Setting | 12 |
| Test Propeller Part Number | YB-1620 |
| Test Propeller New Engine RPM | 4750-4950 |
Maintenance Summary
Keeping this 3-cylinder 1140cc inline two-stroke healthy requires regular upkeep. Always gap fresh NGK B8HS-10 spark plugs to 0.035–0.039 inches (0.9–1.0 mm). Inspect the water pump impeller annually, maintain clean fuel mixes, and service the gearcase lubricant regularly to ensure long-term durability and crisp throttle response.
Disclaimer & Information Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only. Always verify data against an official OEM service manual prior to ordering parts or executing repairs. VintageMotorSpecs.com assumes no liability for repair errors, equipment damage, or personal injury resulting from the use of this data.
Spot an error or discrepancy in these specs? Please contact us with your engine details so we can update our database.
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