Piston Assembly – Fits Parsun HDX F4/F5 & Yamaha 4HP 4-Stroke (Replaces F4-04020200, 68D-E1631-00-96)
Piston Assembly – Fits Parsun HDX F4/F5 & Yamaha 4HP 4-Stroke (Replaces F4-04020200, 68D-E1631-00-96) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Piston Assembly – Fits Parsun HDX F4/F5 & Yamaha 4HP 4-Stroke (...
Product Details
This is an aftermarket Piston Assembly – Fits Parsun HDX F4/F5 & Yamaha 4HP 4-Stroke (Replaces F4-04020200, 68D-E1631-00-96), engineered for 4–5 HP 4-Stroke outboard engines from Yamaha (2002–2009) and Parsun/HDX (2002–2009). It is designed to meet OEM specifications for reliable performance in marine environments.
This assembly serves as a direct replacement for Parsun part number F4-04020200 and Yamaha part numbers 68D-E1631-00-96 and 67D-11631-00-96.
- Engineered for harsh marine environments.
- Designed for direct replacement and hassle-free installation.
- Includes piston, rings, pin, and circlips for a complete overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Parsun | F4-04020200 |
| Yamaha | 68D-E1631-00-96 |
| Yamaha | 67D-11631-00-96 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this piston fits various F4 models manufactured between 2002 and 2008. Verify your specific model code against the list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4MLH | 4 | 4-Stroke | 2005–2008 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MSHC | 4 | 4-Stroke | 2004 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MLHC | 4 | 4-Stroke | 2004 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MLHB | 4 | 4-Stroke | 2003 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MSHD | 4 | 4-Stroke | 2005 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MSH | 4 | 4-Stroke | 2005–2008 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MSHA | 4 | 4-Stroke | 2002 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MSHB | 4 | 4-Stroke | 2003 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MLHA | 4 | 4-Stroke | 2002 | 68D-E1631-00-96 | Crankshaft Piston |
| Yamaha | F4MLHD | 4 | 4-Stroke | 2005 | 68D-E1631-00-96 | Crankshaft Piston |
For Parsun and HDX owners, this assembly is compatible with all F4 and F5 models from 2002 to 2009.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Parsun | F4 | 4 | 4-Stroke | 2002–2009 | F4-04020200 | Compatible with all F4 variants |
| Parsun | F5 | 5 | 4-Stroke | 2002–2009 | F4-04020200 | Uses same piston as F4 models |
| HDX | F4 | 4 | 4-Stroke | 2002–2009 | F4-04020200 | HDX branded variant |
| HDX | F5 | 5 | 4-Stroke | 2002–2009 | F4-04020200 | HDX branded variant |
Technical Specs
- Product Type
- Piston Assembly
- Material
- High-quality durable metal
- Bore x Height
- 59mm x 42.37mm
- Bore Size
- 59mm (Standard)
- Product Dimensions
- 6.5" x 6.5" x 6.5"
- Stroke Type
- 4-Stroke
- Application
- Marine outboard engines
- Compatibility
- Precision-engineered for Parsun HDX F4/F5 and Yamaha 4HP outboard motors
- Durability
- Engineered for marine environments
- Installation
- Direct replacement
What’s in the Box
- 1 x Piston (68D-E1631-00-96/F4-04020200)
- 3 x Piston Rings (68D-E1603-00)
- 2 x Circlips (93450-14088)
- 1 x Piston Pin (68D-E1633-00)
Installation Notes
- Disconnect the battery and spark plug wire to prevent accidental starting.
- Drain the engine oil and coolant.
- Carefully remove the cylinder head and any components obstructing access to the piston.
- Rotate the crankshaft to move the old piston to the bottom of its travel, then remove the connecting rod cap and push the piston out from the bottom.
- Install the new piston rings onto the new piston, ensuring correct orientation and gap alignment per your service manual.
- Lubricate the new piston and cylinder bore with fresh engine oil.
- Install the new piston assembly into the cylinder, using a piston ring compressor to guide it in smoothly.
- Reattach the connecting rod, torque all bolts to manufacturer specifications, and reassemble the engine in reverse order.
Troubleshooting & FAQ
How do I know if this piston fits my engine?
Confirm your engine's brand, model, horsepower, and year fall within the ranges listed in the compatibility tables. Cross-reference your existing part number with those in the Part Number Matrix for the surest fit.
What are the signs of a failing piston?
Common symptoms include loss of compression, increased oil consumption, blue smoke from the exhaust, and a knocking or rattling sound from the engine. These indicate wear or damage requiring inspection and likely replacement.
Is this a standard or oversized piston?
This is a standard 59mm bore piston. It is not an oversized piston used for re-bored cylinders. Always measure your cylinder bore before ordering to ensure correct sizing.
How often should a piston be replaced?
Piston replacement is not a routine maintenance item. It is typically done during a complete engine rebuild or when symptoms of failure (like low compression or scoring) are diagnosed. Lifespan depends on usage, maintenance, and operating conditions.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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