Yamaha 1995 55 HP Outboard Specs & Maintenance
The 1995 55 HP 2-cylinder 2-stroke outboard remains a beloved workhorse for commercial fishermen and recreational boaters alike. Featuring a rugged 46 cubic inch (760cc) displacement, this lightweight twin-cylinder engine delivers exceptional hole-shot power and bulletproof reliability. Whether you are restoring a classic skiff or performing routine service, our comprehensive database provides the technical specs, parts references, and practical DIY advice needed to keep your mid-90s outboard running at peak performance.
Complete Technical Specifications
| Specification | Details |
|---|---|
| Model / Horsepower | 55 |
| Year Range | 1995 |
| Engine Type | IL 2-stroke |
| Cylinders | 2 |
| Displacement | 46 cu-in (760 cc) |
| Bore x Stroke | 3.20 x 2.80 in (82 x 72 mm) |
| Compression Ratio | 6.5:1 |
| Full Throttle RPM | 4500-5500 |
| Idle Speed (Neutral) RPM | |
| Idle Speed (Trolling) RPM | |
| Spark Plug (NGK) | B8HS-10 |
| Spark Plug (Champion) | L78C |
| Spark Plug Gap | |
| Ignition System | CDI |
| Ignition Timing (Idle) | |
| Ignition Timing (Carb Pickup) | |
| Ignition Timing (Full Advance) | 25-27 |
| Fuel System | Carb |
| Starting System | Manual or Elec |
| Oil Injection System | Pre-Mix 50:1 |
| Injection Oil Ratio | Pre-Mix 50:1 |
| Gear Oil Capacity (mL/cc) | 500 |
| Gear Oil Capacity (Oz) | 16.9 |
| Approximate Weight | 192-218 lbs (87-99 kg) |
| Battery CCA / Reserve | 380 (70) |
| Battery Reserve | 124 minutes |
| Tach Pole Setting | 4 |
| Test Propeller Part Number | YB-1611 |
| Test Propeller New Engine RPM | 5300-5500 |
Maintenance Summary
Keeping this twin-cylinder 2-stroke humming requires consistent upkeep. Always inspect and replace your NGK B8HS-10 spark plugs regularly to prevent misfires. Prioritize fresh fuel mixtures, seasonal lower unit gear lube changes, and annual water pump impeller replacements to protect this high-torque 760cc powerhead from overheating.
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Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only.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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