Japan Yamarine Outboard Piston Kit 688-11631-03-94, Piston Ring 688-11603-00 Fit for YAMAHA 48/55/75/85HP

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: 688-11631-03-94
• Application: Boat
• Standard: ISO
• Customized: Non-Customized
• Surface Treatment: Polished
• Material: Aluminum
• Type: Piston
• Transport Package: Single Box, Plastic Tube
• Specification: ISO
• Trademark: YAMARINE
• Origin: China, Japan, Taiwan of China
• HS Code: 8409911000
• Production Capacity: 1000000 PCS Per Year

Product Description

 

PART NUMBER	FOR ENGINE	PISTON KIT
677-11631-00	YAMAHA 8HP	PISTON KIT
6E7-11631-00	YAMAHA 15HP	PISTON KIT
61N-11631-00	YAMAHA 30HP	PISTON KIT
66T-11631-00	YAMAHA 40HP	PISTON KIT
6F5-11631-00	YAMAHA 40HP	PISTON KIT
6F6-11631-00	YAMAHA 40HP	PISTON KIT
6K5-11631-00	YAHAMA 60HP	PISTON KIT
688-11631-00	YAMAHA 48/55/75/85	PISTON KIT
SUZUKI 15HP	SUZUKI 15HP	PISTON KIT
SUZUKI 30HP	SUZUKI 30HP	PISTON KIT
SUZUKI 40HP	SUZUKI 40HP	PISTON KIT
TOHATSU 5HP		PISTON KIT
TOHATSU 8HP		PISTON KIT
TOHATSU 15HP		PISTON KIT
TOHATSU 18HP		PISTON KIT

Yamaha outboard piston kit is a collection of components used to rebuild or replace the piston assembly in a Yamaha outboard motor. The piston is a critical part of the engine, responsible for converting the energy from fuel combustion into mechanical motion. Over time, pistons and related components can wear out or become damaged, requiring replacement. A piston kit typically includes all the necessary parts to restore the piston assembly to proper working condition.

 

Components of a Yamaha Outboard Piston Kit

A typical Yamaha piston kit includes the following parts:

1. Piston:

   • The main component that moves up and down inside the cylinder.

   • Made of durable materials like aluminum alloy.

2. Piston Rings:

   • Seal the gap between the piston and cylinder wall.

   • Prevent gas leakage and ensure proper compression.

3. Piston Pin (Wrist Pin):

   • Connects the piston to the connecting rod.

   • Allows the piston to pivot as it moves.

4. Circlips:

   • Secure the piston pin in place.

   • Prevent the pin from moving out of position.

5. Bearings:

   • Reduce friction between the piston pin and connecting rod.

   • Ensure smooth operation.

6. Gaskets and Seals:

   • Provide a tight seal between the cylinder and other engine components.

   • Prevent oil and gas leaks.

 

When to Replace a Yamaha Outboard Piston Kit

• Loss of Compression: Poor engine performance or difficulty starting.

• Excessive Smoke: Indicates worn piston rings or cylinder damage.

• Engine Knocking: Caused by a loose or damaged piston.

• Visible Damage: Scratches, cracks, or scoring on the piston or cylinder walls.

• High Hours of Use: Regular wear and tear over time.

 

Steps to Replace a Yamaha Outboard Piston Kit

Replacing a piston kit is a complex task that requires mechanical expertise. Here's a general outline of the process:

1. Disassemble the Engine:

   • Remove the cylinder head and other components to access the piston.

2. Remove the Old Piston:

   • Take out the piston pin and connecting rod.

   • Carefully remove the old piston and rings.

3. Clean the Cylinder:

   • Inspect the cylinder for damage or wear.

   • Hone the cylinder to ensure a smooth surface for the new piston.

4. Install the New Piston:

   • Attach the new piston rings to the piston.

   • Insert the piston into the cylinder and connect it to the rod using the piston pin and circlips.

5. Reassemble the Engine:

   • Reinstall the cylinder head, gaskets, and other components.

6. Test the Engine:

   • Start the engine and check for proper operation.

 

Choosing the Right Yamaha Piston Kit

• Compatibility: Ensure the kit matches your outboard motor's make, model, and year.

• Quality: Opt for OEM (Original Equipment Manufacturer) or high-quality aftermarket parts.

• Application: Consider the type of use (e.g., recreational, commercial) and operating conditions (e.g., saltwater, freshwater).

 

Popular Yamaha Piston Kit Models

1. Yamaha F25/F30 Piston Kit:

   • Includes piston, rings, pin, and circlips for 25-30hp 4-stroke models.

2. Yamaha 90-115hp 2-Stroke Piston Kit:

   • Designed for older 2-stroke models like the C90/C115.

3. Yamaha V6 Piston Kit:

   • For high-performance models like the 150-250hp V6 outboards.

 

Maintenance Tips to Extend Piston Life

1. Regular Oil Changes: Keep the engine lubricated to reduce wear.

2. Use Quality Fuel: Avoid contaminated or low-quality gasoline.

3. Monitor Engine Temperature: Overheating can damage pistons and cylinders.

4. Inspect Regularly: Check for signs of wear or damage during routine maintenance.

 

Cost Estimates

• OEM Yamaha Piston Kit: 150-150-400 (depending on the model).

• Aftermarket Piston Kit: 80-80-200 (e.g., Wiseco, Pro Marine).

 

If you need help selecting a piston kit or have questions about the replacement process, feel free to ask!