Mercury MerCruiser Quicksilver — Zeus Trim O-Ring Kit — 8M0164166
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Mercury MerCruiser Quicksilver Zeus Trim O-Ring Kit — 8M0164166
This genuine OEM O-ring service kit is designed for the trim system on select Mercury MerCruiser Zeus pod drives. It restores proper hydraulic sealing at the trim cylinder, position sensor, and manifold, helping keep the trim circuit leak-free and performing to factory spec.
Part Details
- Part Number: 8M0164166
- Full Service Number: 25-8M0164166
- Brand: Mercury Marine / Quicksilver
- Product Type: O-Ring Kit
- System: Zeus Pod Drive / Trim System
- Diagram Position: Item 16 in the Zeus 3000 trim-components diagram
- GTIN/UPC: 678633122989
Compatible Applications
- MerCruiser Zeus 3000 pod-drive trim assemblies, serial range 0M968887–0M968892
- MerCruiser Zeus 3000 pod-drive trim assemblies, serial 0M969003 and up
Always confirm your drive model and serial number against the Zeus trim-components diagram before ordering, since the trim assembly uses several similar-looking O-rings in different positions.
When This Part Needs Replacement
Replace this O-ring kit when servicing the trim assembly if the original seals are leaking, flattened, cut, hardened, or disturbed during disassembly. Inspect hydraulic sealing surfaces for corrosion or damage at the same time.
Installation Notes
Install the O-rings only in the locations specified by the Zeus trim-system service procedure, keep hydraulic components clean during assembly, and lubricate seals only with the lubricant Mercury specifies for this service. Nearby diagram components include the trim cylinder (8M8023292), position sensor (8M0050826), O-ring 831985, and O-ring 63351.
Related Parts
- 8M8023292 — Trim Cylinder
- 8M0050826 — Position Sensor
- 831985 — O-Ring
- 63351 — O-Ring
Technical FAQ
Does this kit include every O-ring in the Zeus trim assembly?
No. The trim assembly uses several separate O-rings in addition to this kit, so diagram position should be used to confirm exactly which seals a given job needs.
Is there a superseding part number?
No verified superseding number is available for 8M0164166.
Parts Desk Insights
Best use case: this kit is for refreshing the O-ring seals in the Zeus 3000 trim assembly during routine service or when disassembling the trim components for repair.
Common mistake: ordering by general description alone. Zeus trim assemblies use several O-rings that look alike but seal different locations, so the diagram position and drive serial number should always be checked first.
Sizing and fitment guidance: if you are servicing a Zeus 3000 pod drive, confirm your drive's serial number falls within the verified ranges above before ordering, and inspect surrounding components like the trim cylinder and sensor while the assembly is open.
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.