Yamaha 1996 40 HP Outboard Specs & Maintenance
The 1996 40 HP two-stroke outboard remains a beloved workhorse for boaters seeking lightweight power and bulletproof reliability. Driven by a robust 36 cu. in. (592 cc) 2-cylinder inline engine, this vintage motor delivers impressive hole-shots and simple, straightforward maintenance. Whether you’re restoring a classic skiff or keeping your daily runabout humming, our comprehensive database provides the factory specs, technical guides, and part details you need to keep your 1996 40HP running smooth.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 40 |
| Year Range | 1996 |
| Engine Type | IL 2-stroke |
| Cylinders | 2 |
| Displacement | 36 cu-in (592 cc) |
| Bore x Stroke | 2.95 x 2.64 in (75 x 67 mm) |
| Compression Ratio | 6.5:1 |
| Full Throttle RPM | 4500-5500 |
| Idle Speed (Neutral) | 1100-1200 |
| Idle Speed (Trolling) | — |
| Spark Plug (NGK) | B8HS-10 |
| Spark Plug (Champion) | L78C |
| Spark Plug Gap | 0.024-0.28 in (0.5-0.6 mm) |
| Ignition System | CDI |
| Ignition Timing (Idle) | 1-3 |
| Ignition Timing (Carb Pickup) | 5 |
| Ignition Timing (Full Advance) | 21-23 |
| 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) | 315 |
| Gear Oil Capacity (Oz) | 10.7 |
| Approximate Weight | 133-165 lbs (61-75 kg) |
| Battery CCA / Reserve | 385 (70) |
| Battery Reserve | 124 minutes |
| Tach Pole Setting | 4 |
| Test Propeller Part Number | YB-1611 |
| Test Propeller New Engine RPM | 4800-5000 |
Maintenance Summary
Keep your 1996 40 HP inline-two firing cleanly by maintaining proper fuel-oil ratios and fresh ignition components. Always use NGK B8HS-10 spark plugs gapped to 0.024–0.028 inches (0.5–0.6 mm). Regular gearcase lube changes and impeller inspections ensure this dependable 592cc 2-stroke stays ready for the water.
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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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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