Yamaha 1995-96 40 HP Outboard Specs & Maintenance
Known for its smooth power delivery and rock-solid reliability, the 1995-1996 40 HP 3-cylinder 2-stroke outboard remains a favorite among boating enthusiasts. Displacing 43 cubic inches (698 cc), this inline triple offers an ideal balance of lightweight performance and punchy torque for mid-sized aluminum boats and skiffs. Whether you are performing routine service or a complete overhaul, our database provides the specs DIY mechanics need to keep this classic motor running strong.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 40 |
| Year Range | 1995-96 |
| Engine Type | IL 2-stroke |
| Cylinders | 3 |
| Displacement | 43 cu-in (698 cc) |
| Bore x Stroke | 2.64 x 2.60 in (67 x 66 mm) |
| Compression Ratio | 6.0:1 |
| 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 |
| Ignition Timing (Idle) | 6-8 ATDC |
| Ignition Timing (Carb Pickup) | 6-8 ATDC |
| Ignition Timing (Full Advance) | 24-28 |
| 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) | 430 |
| Gear Oil Capacity (Oz) | 14.5 |
| Approximate Weight | 149-198 lbs (68-90 kg) |
| Battery CCA / Reserve | 380 (70) |
| Battery Reserve | 124 minutes |
| Tach Pole Setting | 6 |
| Test Propeller Part Number | YB-1611 |
| Test Propeller New Engine RPM | 4900-5100 |
Maintenance Summary
Keep your 40 HP inline-3 firing cleanly by servicing the fuel system annually and inspecting the lower unit water pump. For optimal ignition performance, always run NGK B8HS-10 spark plugs set to a gap of 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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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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