Yamaha 1994-96 80 HP Outboard Specs & Maintenance
Looking to keep your 1994-1996 80 HP 3-cylinder outboard running at peak performance? Built with a robust 70 cubic inch (1140 cc) inline 2-stroke design, this legendary mid-range motor delivers exceptional torque and reliability on the water. Whether you are performing routine tuning, rebuilding the carbs, or hunting down exact factory specs, our technical guide provides DIY mechanics with the vital engine details needed to maintain this classic 2-stroke powerhead effortlessly.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 80 |
| Year Range | 1994-96 |
| 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 | 5.9:1 |
| 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 | CDI Micro |
| Ignition Timing (Idle) | 7-9 ATDC |
| Ignition Timing (Carb Pickup) | 7-9 ATDC |
| Ignition Timing (Full Advance) | 19-21 |
| Fuel System | Carb |
| Starting System | Electric |
| Oil Injection System | Precision Blend |
| Injection Oil Ratio | Precision Blend |
| Gear Oil Capacity (mL/cc) | 610 |
| Gear Oil Capacity (Oz) | 20.6 |
| Approximate Weight | 248-277 lbs (112-126 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 | 4800-5000 |
Maintenance Summary
Routine maintenance keeps this 1140 cc inline-3 humming. For optimal ignition, inspect and replace your NGK B8HS-10 spark plugs set to a gap of 0.035–0.039 inches (0.9–1.0 mm). Always use fresh 2-stroke oil, check the lower unit lube, and inspect the water pump impeller regularly.
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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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.
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