Yamaha 1996 15 HP Outboard Specs & Maintenance
The 1996 15 HP 2-stroke outboard remains a benchmark for lightweight, reliable marine power. Featuring a robust 2-cylinder, 246cc inline design, this classic motor delivers exceptional torque-to-weight performance for small fishing boats, skiffs, and tenders. Whether you are performing routine spring maintenance or restoring a trusted workhorse, our database provides the technical specs and factory guidance DIY mechanics need to keep this legendary engine running flawlessly.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 15 |
| Year Range | 1996 |
| Engine Type | IL 2-stroke |
| Cylinders | 2 |
| Displacement | 15 cu-in (246 cc) |
| Bore x Stroke | 2.20 x 1.97 in (56 x 50 mm) |
| Compression Ratio | 6.8:1 |
| Full Throttle RPM | 4500-5500 |
| Idle Speed (Neutral) RPM | 700-800 |
| Idle Speed (Trolling) RPM | 600-700 |
| Spark Plug (NGK) | B7HS-10 |
| Spark Plug (Champion) | L82C |
| Spark Plug Gap | 0.035-0.039 in (0.9-1.0 mm) |
| Ignition System | CDI |
| Ignition Timing (Idle) | 4-6 |
| Ignition Timing (Carb Pickup) | — |
| Ignition Timing (Full Advance) | 29-31 |
| Fuel System | Carb |
| Starting System | Man or Man & Elec |
| Oil Injection System | Pre-Mix 100:1 |
| Injection Oil Ratio | Pre-Mix 100:1 |
| Gear Oil Capacity (mL/cc) | 185 |
| Gear Oil Capacity (Oz) | 6.3 |
| Approximate Weight | 80-90 lbs (36-41 kg) |
| Battery CCA / Reserve | 210 (40) |
| Battery Reserve | 59 minutes |
| Tach Pole Setting | 4 |
| Test Propeller Part Number | YB-1619 |
| Test Propeller New Engine RPM | 5200-5400 |
Maintenance Summary
Keeping this 246cc twin running smoothly requires routine two-stroke maintenance. Regularly inspect the water pump impeller, service the lower unit gear lube, and maintain fresh fuel mixture. For optimum ignition, install fresh NGK B7HS-10 spark plugs gapped precisely between 0.035–0.039 inches (0.9–1.0 mm).
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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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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