Mercury Outboard Roller Bearing Counter-Rotation Gear Housing 15841
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Mercury Quicksilver 15841 is a genuine OEM roller bearing used in Mercury and Mariner outboard gear housing / propshaft assemblies. Current Mercury dealer references list it as 31-15841 BEARING Roller, and current parts diagrams place it in the counter-rotation propeller shaft gear housing service area.
Key Features
- Genuine Mercury Marine OEM part number 15841 / 31-15841.
- Current Mercury dealer description identifies it as BEARING Roller.
- Current dealer listing shows GTIN 745061114845.
- Current dealer shipping specs are approximately 0.13 lb, 4.00 in. x 4.00 in. x 0.25 in.
- Current parts diagrams place it in the same lower-unit stack as related parts like thrust ring 17616, O-ring 31534, adapter assembly bearing 18447A2 / 818292A1, and thrust bearing 15842.
Engine Compatibility
The strongest supportable fitment for 15841 is Mercury and Mariner outboard counter-rotation gear housing / propshaft service. Current parts sources connect it to applications including 105 Jet, 140 Jet, 135/150/175/200/XR6/Magnum III, V-175, 250/275, and 2.4L EFI race outboard propeller-shaft counter-rotation gear housings.
Serial Number Fitment Notice
Verify fitment by exact outboard serial number and the correct gear housing / propshaft counter-rotation parts diagram before ordering. This bearing appears across multiple Mercury and Mariner lower-unit families, so serial-based confirmation is the safest way to match the correct bearing position.
When This Part Needs Replacement
Replace this bearing when the lower unit is apart for propshaft or gear-housing service and the original bearing shows wear, pitting, roughness, corrosion, or damage. Because current diagrams place it in the propeller-shaft bearing stack, bearing condition matters directly to lower-unit service quality. This is a practical service inference supported by its documented location in the gear housing assembly.
Installation Notes
Install 15841 only after confirming the correct Mercury or Mariner lower-unit diagram for the unit being serviced. Current parts diagrams show it in the counter-rotation propshaft housing with adjacent thrust and adapter components, so it should be matched to the exact lower-unit assembly during reassembly.
Alternate/Superseded Part Numbers
Current sources reviewed show 15841 as the active OEM reference for this roller bearing. The sources checked did not show a newer Mercury superseding part number for this bearing.
Parts Desk Insight
For lower-unit bearings like this, the important match is the exact gear housing layout and rotation style. Checking the counter-rotation propshaft diagram first is the simplest way to avoid ordering the wrong lower-unit bearing.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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