Crankshaft Needle Bearing – Fits Yamaha 25-30HP 2-Stroke Outboards (Replaces 93311-632V4)
Crankshaft Needle Bearing – Fits Yamaha 25-30HP 2-Stroke Outboards (Replaces 93311-632V4) 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
Crankshaft Needle Bearing – Fits Yamaha 25-30HP 2-Stroke Outboards ...
Product Details
This Crankshaft Needle Bearing is designed for older model Yamaha 25–30 HP 2-Stroke outboard motors within the 61N, 61T, and 61R series. It provides a reliable, OEM-equivalent replacement for critical internal engine components, ensuring proper crankshaft function.
It serves as a direct interchange for Yamaha part 93311-632V4, as well as aftermarket cross-references including OVERSEE NQ324832UW11-1 and YAMABOYA 93311-632V4.
- Engineered for press-fit installation on the crankshaft end.
- Constructed from durable steel/metallochrome to withstand internal engine stresses.
- Includes oil seal 93102-32M07 as noted by aftermarket supplier OVERSEE.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93311-632V4 |
| OVERSEE | NQ324832UW11-1 |
| YAMABOYA | 93311-632V4 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha outboards, this bearing fits older model 25-30HP 2-stroke engines in the 61N, 61T, and 61R series.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 61N/61T/61R Series | 25-30 | 2-Stroke | 93311-632V4 | Old version 2-stroke models |
Technical Specs
- Product Type
- Crankshaft Needle Bearing
- Installation
- Internal, Crankshaft End
- Fuel Type
- Gasoline
- Connection
- Cylinder Interface
- Housing Material
- Steel/Metallochrome
- Housing Color
- Metal/Silver
- Dimensions
- 32 × 48 × 32 mm (inner × outer × width)
- Weight
- 0.300 kg (0.661 lb)
- Fitting Type
- Press-Fit
- Other Technical Attributes
- Includes oil seal 93102-32M07 (per OVERSEE)
What’s in the Box
- 1 x Crankshaft Bearing (93311-632V4)
- 1 x Oil Seal (93102-32M07) - Note: Inclusion of oil seal is mentioned by OVERSEE but not confirmed by other sources
Installation Notes
- Ensure the engine is off, cooled, and disconnected from the power source before starting.
- Disassemble the engine casing and components required to access the crankshaft assembly.
- Carefully remove the old bearing using a certified bearing puller tool. Avoid makeshift methods.
- Thoroughly clean the crankshaft and housing seating area, removing all old lubricant and debris.
- Use a press-fit tool to install the new bearing evenly onto the crankshaft. Never use a hammer or impact force, as this can damage the bearing.
- Install the new oil seal (if included and applicable to your specific model).
- Reassemble the engine according to the manufacturer's service manual, ensuring all components are torqued to the correct specifications.
- Manually verify smooth crankshaft rotation before finalizing reassembly and starting the engine.
Troubleshooting & FAQ
How do I know if this bearing fits my engine?
This bearing is specifically for older Yamaha 25-30HP 2-stroke outboards in the 61N, 61T, and 61R series. The most reliable way to confirm fitment is by checking your old part for the number 93311-632V4 and verifying its dimensions are 32 × 48 × 32 mm.
What is the difference between this bearing and the one for newer 25/30HP models?
This bearing (93311-632V4) has dimensions of 32 × 48 × 32 mm. Newer Yamaha 25/30HP outboards use the 93399-99951 bearing, which is larger at 36 × 52 × 32 mm. The two parts are not interchangeable, so confirming your model version is critical.
What are the signs of a failing crankshaft bearing?
Common symptoms include a rumbling, grinding, or knocking noise from the engine block, excessive vibration during operation, or the presence of metal shavings in the engine or gearcase oil. A failed bearing can lead to severe engine damage if not addressed promptly.
Do I need a special tool for installation?
Yes, professional installation using a bearing puller and a press-fit tool is required for safe removal and installation. Using improper tools like a hammer or punch can easily damage the new bearing, the crankshaft, or the engine case.
Is the oil seal always included?
Our package includes one oil seal (93102-32M07), as its inclusion is noted by at least one major aftermarket supplier (OVERSEE). However, please note that not all aftermarket versions may offer this. We provide what is listed in the "What’s in the Box" section.
When should I replace my crankshaft bearing?
Crankshaft bearings do not have a fixed service interval. They should be inspected for smoothness, play, and noise during any major engine service or rebuild and replaced if any signs of wear, corrosion, or damage are found.
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.
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