Yamaha 1996 250 HP Outboard Specs & Maintenance
Unleash raw offshore power with the 1996 250 HP 2-stroke outboard engine. Featuring a robust 76-degree V6 block boasting a massive 191 cubic inch (3130 cc) displacement, this two-stroke workhorse remains a legendary favorite for vintage boat restorations and heavy-duty hull setups. Whether you’re troubleshooting ignition issues or sourcing original specifications, our database provides the essential technical data DIY marine mechanics need to keep this 250-horsepower beast running smooth and strong.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 250 |
| Year Range | 1996 |
| Engine Type | 76 LV 2-st |
| Cylinders | 6 |
| Displacement | 191 (3130) |
| Bore x Stroke | 3.54 x 3.23 cu-in (90 x 82 cc) |
| Compression Ratio | 5.9:1 |
| Full Throttle RPM | 4500-5500 |
| Idle Speed (Neutral) RPM | 675-725 |
| Idle Speed (Trolling) RPM | 575-625 |
| Spark Plug (NGK) | BR8HS-10 |
| Spark Plug (Champion) | QL78C |
| Spark Plug Gap | 0.035-0.039 in (0.9-1.0 mm) |
| Ignition System | CDI Micro |
| Ignition Timing (Idle) | 4-8 ATDC |
| Ignition Timing (Carb Pickup) | 4-8 ATDC |
| Ignition Timing (Full Advance) | 18-22 |
| Fuel System | Carb |
| Starting System | Electric |
| Oil Injection System | Precision Blend |
| Injection Oil Ratio | Precision Blend |
| Gear Oil Capacity (mL/cc) | 1150 |
| Gear Oil Capacity (Oz) | 38.9 |
| Approximate Weight | 506-525 lbs (230-238 kg) |
| Battery CCA / Reserve | 512 (100) |
| Battery Reserve | 182 minutes |
| Tach Pole Setting | 12 |
| Test Propeller Part Number | — |
| Test Propeller New Engine RPM | — |
Maintenance Summary
Keeping this high-displacement 3.1L V6 running reliably requires proper maintenance. Standardize your ignition setup with NGK BR8HS-10 spark plugs, gapped strictly between 0.035 and 0.039 inches (0.9–1.0 mm). Always inspect cooling system impellers and maintain clean fuel to protect this legendary 2-stroke engine from lean conditions.
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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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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