Center Split Sleeve Bearing – Fits Johnson/Evinrude 40HP-70HP & Mercruiser (Replaces 0310433, 31-88903T)
Center Split Sleeve Bearing – Fits Johnson/Evinrude 40HP-70HP & Mercruiser (Replaces 0310433, 31-88903T) 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
Center Split Sleeve Bearing – Fits Johnson/Evinrude 40HP-70HP &...
Product Details
This aftermarket Center Split Sleeve Bearing – Fits Johnson/Evinrude 40HP-70HP & Mercruiser is a crucial component for maintaining the rotational integrity of the crankshaft. It is designed for a precise fit on a range of Johnson/Evinrude 40-75 HP 2-cylinder, 3-cylinder, and V4 outboard engines, as well as various Mercruiser sterndrive models.
This part serves as a direct replacement for OMC/Johnson/Evinrude part numbers 0310433 and 310433, and Mercruiser part numbers 31-88903T, 88903, and 67447.
- Installs via press-fit into the crankcase or bearing pocket.
- The split design simplifies installation, often allowing it to be performed without complete engine disassembly.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC / Johnson / Evinrude | 0310433, 310433 |
| Mercruiser | 31-88903T, 88903, 67447 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude: This bearing fits specific 2-cylinder, 3-cylinder, and V4 outboards. Check your model and year range carefully.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Johnson/Evinrude | 2-cylinder | 40-60 HP | 2-Stroke | 1971 & later | 0310433/310433 |
| Johnson/Evinrude | 3-cylinder | 60-75 HP | 2-Stroke | 1975–2004 | 0310433/310433 |
| Johnson/Evinrude | V4 | Various | 2-Stroke | 1962–1978 | 0310433/310433 |
For Mercruiser: Fits various sterndrive models using the specified part numbers. Cross-reference your OEM part number for compatibility.
| Brand | Model | OEM Part No. |
|---|---|---|
| Mercruiser | Various | 31-88903T/88903/67447 |
Technical Specs
- Product Type
- Crank Shaft Center Split Sleeve Bearing
- Installation
- Press-fit into crankcase or bearing pocket
- Weight
- 166 g (0.37 lb)
- Dimensions
- 13.0 cm x 11.0 cm x 2.0 cm
- Fitting Type
- Split sleeve
- Other Technical Attributes
- Split design allows installation without complete engine disassembly
What’s in the Box
- 1 x Crank Shaft Center Split Sleeve Bearing (Replaces 0310433)
Installation Notes
- Ensure the engine is safely secured and the crankcase is accessible. Thoroughly clean the bearing pocket and surrounding area, removing any old material or debris.
- Carefully align the two halves of the split sleeve bearing around the crankshaft journal. Confirm correct orientation before proceeding.
- Using an appropriate bearing press tool, apply steady and even pressure to press-fit the assembled bearing into the crankcase pocket until it is fully seated.
- Once installed, slowly rotate the crankshaft by hand to ensure there is smooth, free movement without any binding or excessive resistance.
Troubleshooting & FAQ
How do I confirm this bearing fits my specific engine model?
The most reliable method is to match your existing part number to the cross-references listed in our Part Number Matrix (OMC/Johnson/Evinrude 0310433 or Mercruiser 31-88903T). You can also use the Engine Compatibility table to check your engine's brand, model, HP, and year.
What is the main advantage of a split sleeve bearing design?
The split design allows the bearing to be installed around the crankshaft without requiring a complete engine teardown to slide it on from the end. This can significantly reduce labor time and complexity during replacement.
What are common signs that my crankshaft bearing needs replacement?
Symptoms of a failing crankshaft bearing include a knocking or rumbling noise from the engine that often changes with RPM, excessive engine vibration, and the presence of metal shavings in the engine oil upon inspection.
Is any special preparation needed before installation?
Yes. The crankcase bearing pocket must be immaculately clean and free of burrs or scoring. It's also good practice to apply a light coat of assembly lube to the bearing surfaces and crankshaft journal before pressing the bearing into place.
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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