2004 Yamaha F25TLRD Long Tiller – 4S (M17457)

2004 Yamaha F25TLRD Long Tiller – 4-Stroke (M17457) is a reliable and efficient outboard engine designed for small to medium-sized boats. Its 4-stroke technology offers excellent fuel economy, quiet operation, and reduced emissions, making it a popular choice among boaters who prioritize performance and sustainability. Below is a comprehensive description:

Information

• Brand: Yamaha
• Model Year: 2004
• Horsepower: 25 HP
• Engine Type: 4-Stroke
• Control Type: Tiller Handle
• Shaft Length: Long (20 inches)
• Starting System: Electric Start with Manual Backup
• Weight: Approximately 172 lbs

Key Features

• Electric Start: Easy and reliable starting with a manual pull-start backup for emergencies.
• 4-Stroke Technology: Offers better fuel efficiency, quieter operation, and cleaner emissions compared to 2-stroke engines.
• Tiller Handle Control: Features an ergonomic design with integrated throttle and gear shift for intuitive handling.
• Durable Construction: Yamaha’s corrosion-resistant materials ensure long-lasting performance in both freshwater and saltwater conditions.
• High Thrust Design:  Ideal for pushing heavier loads or operating in demanding conditions.

Fuel and Oil

• Fuel Type: Unleaded gasoline (minimum 87 octane).
• Oil Type: Yamaha 4M 10W-30 or equivalent 4-stroke marine oil.
• Oil Capacity: Approximately 1.9 quarts (with filter change).
• Fuel Tank: Compatible with an external fuel tank, typically 6–12 gallons.

Performance and Applications

• Top Speed: Capable of reaching 20–30 mph, depending on boat size, weight, and load.

Applications:

• Fishing boats
• Jon boats
• Utility boats
• Small pontoons

Maintenance Tips

Oil System Maintenance

• Change the engine oil and oil filter every 100 hours or annually, whichever comes first.
• Use Yamaha-branded oil and filters for optimal performance.

Cooling System Care

• Flush the motor with fresh water after saltwater use to prevent corrosion.
• Inspect and replace the water pump impeller every 2–3 years or if cooling performance decreases.

 Fuel System Maintenance

• Use fresh, ethanol-free gasoline to avoid fuel line and carburetor issues.
• Replace the fuel filter annually to maintain clean fuel delivery.

Spark Plug Maintenance

• Recommended Spark Plug: NGK DPR6EA-9 or equivalent.
• Inspect and clean spark plugs every 100 hours or annually.
• Replace if fouled or worn and ensure the gap is set to 0.035 inches (verify in the owner’s manual).

 Gearcase Maintenance

• Change the lower unit gear oil annually or every 100 hours.
• Check for water intrusion (milky oil) and replace seals if necessary.

Common Issues and Troubleshooting

Hard Starting

• Cause: Stale fuel, weak battery, or fouled spark plugs.
• Solution: Use fresh fuel, check the battery charge, and replace spark plugs as needed.

Overheating

• Cause: Clogged water intake or worn impeller.
• Solution: Clear the intake screen and replace the water pump impeller.

Loss of Power

• Cause: Dirty carburetor, damaged propeller, or low compression.
• Solution: Clean the carburetor, inspect the propeller for damage, and perform a compression test.

Parts and Accessories

OEM Parts

• Yamaha Dealers: Genuine parts are available through authorized Yamaha dealers.
• Online Retailers:
  • YamahaOutboards.com
  • Boats.net

Aftermarket Parts

• Sierra Marine: Provides aftermarket components such as oil filters, fuel filters, and spark plugs.
• NGK Spark Plugs: Reliable replacements for the recommended spark plugs.

Used Parts

• eBay: A good source for used or refurbished parts.
• Marine Salvage Yards: Often have parts for older outboard models.

Performance Enhancements

Propeller Upgrade:

• Upgrade to a stainless steel propeller for increased durability and improved performance.
• Adjust pitch to suit specific needs (e.g., higher pitch for speed, lower pitch for torque).

Fuel Optimization:

• Use a fuel stabilizer to prevent gum and varnish buildup during storage.
• Consider installing a water-separating fuel filter for additional protection.

Periodic Tune-Ups:

• Regularly inspect and clean the carburetor and fuel injectors.
• Perform decarbonization every 100 hours to maintain peak performance.

Additional Notes

• The Yamaha F25TLRD is known for its reliability and efficient operation, making it an excellent choice for a variety of boating applications.
• Its 4-stroke engine design ensures compliance with modern environmental standards while delivering robust performance. 2004 Yamaha F25TLRD Long Tiller – 4S (M17457)