Outboard Motor Special Needle Roller Bearings
MARATO supplies heavy-duty and special needle roller bearings for selected outboard motor gearboxes, drive shafts and transmission assemblies. These bearings are intended for applications requiring high radial load capacity, compact installation dimensions and accurate shaft support.
Available configurations include machined-ring needle bearings, bearings with separate inner rings, bearings designed to run directly on a prepared shaft surface and special bearing assemblies identified by manufacturer OE number.
Available Bearing Configurations
- NA series needle roller bearings with inner ring
- RNA series needle roller bearings without inner ring
- KS series needle roller and cage assemblies
- NQ series special marine needle bearings
- RNSFU special outboard motor bearing assemblies
- Needle roller assemblies supplied with separate or split inner races
Representative Bearing Codes and OE References
| Bearing Code | Reference OE Number | Reference Horsepower |
|---|---|---|
| NA4907 | 345-00114-0 | Selected 40 HP applications |
| RNA4910 | 93311-85894 | Selected 200–300 HP applications |
| AG502801 needle assembly | 93311-928U5 | Selected 150–225 HP applications |
| KS354525.8 with IR455224 inner race | 93310-835U8 | Selected 75–85 HP applications |
| NQ365232 | 93399-99951 | Selected 25–30 HP applications |
| 36NQ5238UW11 | 93310-636U4 | Selected 50–90 HP applications |
| 36NQ5238UNRW11 | 93311-636U6 | Selected 25–70 HP applications |
| RNSFU547626W11 | 93310-954U1 / 93310-954V3 | Selected 100–225 HP applications |
| Attribute name | Values |
|---|---|
| Bearing Type | Special Needle Roller Bearing |
| Bearing Series | NA, RNA, KS, NQ, RNSFU |
| Application | Outboard Motor Gearbox, Drive Shaft, Propeller Shaft |
| Inner Ring | With Inner Ring, Without Inner Ring, Separate Inner Race |
| Load Direction | Radial Load |
| Bearing Code | According to customer requirement |
| OE Number | According to engine model |
| Inside Diameter | According to bearing code |
| Outside Diameter | According to bearing code |
| Width | According to bearing code |
| Engine Power | 25–300 HP Reference Range |
| Supply Type | Replacement, Wholesale, OEM |
The listed OE numbers and horsepower ranges are reference information only. Actual compatibility can vary according to the outboard motor brand, complete model, production year, gearbox design and bearing installation position.
Typical Applications
- Outboard motor lower-unit gearboxes
- Drive-shaft support positions
- Propeller-shaft bearing positions
- Transmission and gear assemblies
- Crankshaft-related bearing positions
- Marine engine repair and rebuilding
NA and RNA Bearing Selection
NA bearings include an inner ring and are suitable when the shaft cannot be used directly as a bearing raceway. RNA bearings normally do not include an inner ring and require a shaft surface with suitable hardness, finish and dimensional accuracy. Please confirm the actual construction before ordering.
Information Required for Compatibility Confirmation
- Outboard motor brand and complete model
- Engine horsepower and production year
- Original OE or replacement part number
- Complete bearing code
- Inside diameter, outside diameter and width
- Whether an inner ring is required
- Installation position in the engine or gearbox
- Photos of the original bearing, shaft and housing
- Required order quantity
Product Range Clarification
This page covers special machined-ring and heavy-duty needle roller bearings identified by NA, RNA, KS, NQ, RNSFU and related codes. Loose needle rollers, K-series cage assemblies, AXK thrust bearings and HK/F/TA/B/BH drawn-cup needle bearings are listed on separate product pages.
Wholesale and OEM Supply
MARATO supplies outboard motor bearings and marine replacement parts to importers, wholesalers, repair workshops and equipment-parts distributors. Samples, mixed bearing codes, bulk quantities, customized packaging and OEM branding are available.
Please send the OE number, complete bearing code, dimensions and original bearing photos for selection and quotation.
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