Johnson 30HP Long Tiller – 2S (M16635)

Johnson 30HP Long Tiller – 2-Stroke (M16635) is a durable and efficient outboard motor, ideal for medium-sized boats that require reliable power and performance. Its lightweight 2-stroke design ensures strong acceleration and ease of use, making it a preferred choice for anglers, boaters, and outdoor enthusiasts. Below is a comprehensive description:

Information

• Brand: Johnson
• Horsepower: 30 HP
• Engine Type: 2-Stroke
• Control Type: Tiller Handle
• Shaft Length: Long (20 inches)
• Fuel Delivery: Carbureted

Key Features

• Tiller Handle Control: Integrated throttle and gear shift for intuitive and responsive operation.
• 2-Stroke Power: Provides excellent power-to-weight ratio for quick acceleration and top-end performance.
• Long Shaft Design: Suitable for boats with deeper transoms, offering enhanced performance in various water conditions.
• Durability: Built with robust materials and a corrosion-resistant coating, suitable for both freshwater and saltwater environments.
• Lightweight: Easy to transport and mount on compatible vessels.

Fuel and Oil

• Fuel Type: Pre-mixed unleaded gasoline (minimum 87 octane) with 2-stroke outboard oil.
• Fuel/Oil Mixture Ratio: Typically 50:1 (refer to the owner’s manual for precise ratios).
• Fuel Tank: Generally equipped with a 6-gallon external fuel tank.

Performance and Applications

• Top Speed: Capable of speeds ranging from 20–30 mph, depending on boat size, load, and water conditions.

Applications:

• Fishing boats
• Utility boats
• Jon boats
• Pontoon boat kickers

Maintenance Tips

Routine Fuel System Care

• Always use fresh fuel mixed with high-quality 2-stroke oil.
• Replace the inline fuel filter annually to maintain clean fuel delivery.
• Inspect fuel lines and primer bulbs regularly for signs of wear or cracks.

 Spark Plug Maintenance

• Recommended Spark Plug: Champion QL78YC or equivalent.
• Inspect spark plugs every 50 hours or seasonally and replace if fouled or worn.
• Ensure the gap is set to manufacturer specifications (typically 0.030 inches).

 Cooling System Maintenance

• Flush the motor with freshwater after saltwater use to prevent corrosion.
• Replace the water pump impeller every 2–3 years or as needed.

Gear Oil Maintenance

• Replace lower unit gear oil annually or after 100 hours of operation.
• Check for water intrusion in the oil (milky appearance) and replace seals if necessary.

Decarbonization

• Perform a decarbonization process every 50–100 hours to remove carbon buildup and maintain peak performance.

Common Issues and Troubleshooting

Hard Starting

• Cause: Stale fuel, fouled spark plugs, or improper fuel mixture.
• Solution: Use fresh fuel, check and replace spark plugs, and verify the fuel mixture ratio.

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, fouled spark plugs, or damaged propeller.
• Solution: Clean the carburetor, replace spark plugs, and inspect the propeller for damage.

Parts and Accessories

OEM Parts

• Johnson/Evinrude Dealers: Genuine parts are available through authorized dealers.
• Online Retailers:
  • BRP Parts Catalog
  • Boats.net

Aftermarket Parts

• Sierra Marine: Offers compatible aftermarket components such as fuel filters, water pump kits, and ignition parts.
• NGK Spark Plugs: Reliable replacements for the recommended spark plugs.

Used Parts

• eBay: Search for used or refurbished Johnson 30HP components.
• Marine Salvage Yards: Often have parts for older outboard models.

Performance Enhancements

Propeller Upgrade:

• Use a stainless steel propeller for increased durability and improved performance.
• Adjust pitch to optimize speed or power for specific boating needs.

Fuel Optimization:

• Utilize ethanol-free gasoline to prevent carburetor issues.
• Add a fuel stabilizer for storage during the off-season.

Periodic Maintenance:

• Clean and service the carburetor regularly.
• Perform decarbonization to maintain efficient combustion. Johnson 30HP Long Tiller – 2S (M16635)