Mercury Marine — Driveshaft Housing Grommet — 804899003
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Mercury Driveshaft Housing Grommet 804899003 | 10–20 HP FourStroke
The Mercury 804899003 is a genuine OEM driveshaft-housing grommet used on select small Mercury FourStroke outboards. Mercury diagrams position this grommet in the driveshaft housing near the drain-plug, water-tube, and rubber-seal components. It's supplied individually and remains an active Mercury service part.
Compatible Applications
- 10 HP carbureted 2-cylinder FourStroke
- 15 HP SeaPro FourStroke
- 20 HP carbureted 2-cylinder FourStroke
For the 20 HP carbureted model, verified coverage includes serial 0R235168 and up. Confirm your engine serial number and driveshaft-housing diagram before ordering, since Mercury uses several similar grommets and rubber seals in this area.
Part Details
- Part number: 804899003
- Full service number: 25-804899003
- Brand: Mercury Marine
- Official product type: Driveshaft housing grommet
- System: Driveshaft housing / midsection
- Quantity: 1 per applicable assembly
- UPC: 745061823358
Related Parts
- 895146 — Washer
- 8M0111615 — Drain plug bolt
- 16168003 — Upper rubber seal
- 803755008 — Short water tube
- 803755009 — Long water tube
- 803758001 — Rubber guide
When This Part Needs Replacement
Replace the grommet if it is cracked, hardened, torn, distorted, missing, or damaged during driveshaft-housing service. A deteriorated grommet should be replaced rather than substituted with a generic rubber piece.
Installation Notes
Install in the original driveshaft-housing position shown in the Mercury diagram. Nearby parts include drain-plug bolt 8M0111615, washer 895146, upper rubber seal 16168003, and water tubes 803755008 / 803755009.
Alternate/Superseded Part Numbers
- 804899003 — OEM part number
- 25-804899003 — full Mercury service number
- No verified superseding number
Technical FAQ
Is this a MerCruiser part? No. If you are shopping for a MerCruiser sterndrive or inboard part, this is not it; verified diagrams place 804899003 on small Mercury FourStroke outboards.
How do I know if this fits my 20 HP outboard? If you are unsure, confirm your engine serial number, since verified coverage for the 20 HP carbureted model begins at serial 0R235168.
Parts Desk Insights
Best use case: This grommet is the right part when servicing the driveshaft housing on a small Mercury FourStroke outboard and the original seal is cracked, hardened, or missing.
Common mistake: Several rubber parts sit close together inside these small driveshaft housings. Matching 804899003 by diagram position and serial number, rather than appearance alone, avoids installing the wrong seal.
Sizing and fitment: If you are servicing a 20 HP carbureted outboard, confirm your serial number falls at or above 0R235168 before ordering.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.