Mercury Quicksilver Powerhead Screw 809060A1 | 10-809060A1 | 70 75 80 90 HP 3-Cyl Outboard
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Mercury Quicksilver OEM Powerhead Screw — Part 809060A1
- Part Number: 809060A1 (Mercury catalog format: 10-809060A1)
- Brand: Mercury Marine / Quicksilver (Genuine OEM)
- Official Product Type: Hardware & Fasteners — Powerhead / Induction Manifold
- System: Induction Manifold / Reed Block Assembly
- Diagram Position: Reference item 21 in the Mercury induction-manifold and reed-block assembly diagram
- Supersedes: 40095120 (earlier powerhead screw replaced by 809060A1)
- Also Cross-Referenced As: 40113120
- UPC: 745061293281
- Qty Per Assembly: Mercury diagrams show 8 screws at this location — confirm required quantity against your serial-number-specific parts diagram
What It Does
This is the genuine OEM powerhead screw used at the induction-manifold and reed-block area of select Mercury and Mariner 3-cylinder outboards. It is a specific fastener identified by diagram position and part number — not a general-purpose mercury screw. Several different screw types are used within the same induction-manifold assembly, so matching by diagram location and engine serial number is essential.
Compatible Applications
Verify fitment by engine serial number before ordering. Similar fasteners are used at multiple locations on the same engine.
- Mercury 70 HP — 3 Cylinder
- Mercury 75 HP — 3 Cylinder
- Mercury 80 HP — 3 Cylinder
- Mercury 90 HP — 3 Cylinder
- Mariner 75 HP — selected applications
- Mariner 90 HP — selected applications
Documented serial ranges:
- 0A996142 through 0B240450
- 9483121 through 9506480
Not sure it fits? Send us your Mercury or Mariner outboard serial number before ordering.
Part Numbers & Supersession
- 809060A1 — Current Mercury OEM reference
- 10-809060A1 — Full Mercury catalog format
- 40095120 — Earlier powerhead screw; superseded by 809060A1
- 40113120 — Additional earlier OEM cross-reference associated with 809060A1
Other Fasteners in the Same Assembly
The induction-manifold and reed-block assembly also uses the following screws at other positions — these are separate parts and should not be mixed with 809060A1 during disassembly or reassembly:
- 40011149
- 82127335
- 81742740
When to Replace
Replace this screw when inspection shows:
- Damaged, stretched, or corroded threads
- Rounded or damaged drive surfaces
- Bending or distortion of the fastener
- Damage during powerhead or induction-manifold removal
- The applicable Mercury service procedure calls for replacement
Do not substitute with generic hardware — fasteners securing major powerhead assemblies must meet Mercury’s exact specifications for thread, length, diameter, and finish.
Installation Notes
- Confirm the correct diagram position (item 21) before installing
- Clean mating threads and inspect threaded holes for corrosion or damage
- Apply thread treatment only where specified by the Mercury service manual for this application
- Tighten in the prescribed sequence where applicable
- Use the Mercury torque specification for the applicable engine serial range
- Do not mix this screw with the other fastener types used in the same manifold assembly
Parts Desk Insights
The most common mistake with this screw is assuming any Mercury manifold fastener of similar size can substitute. The induction manifold and reed-block assembly on these 3-cylinder engines uses several different screws at different positions, and they are not interchangeable. Always match by diagram item number and engine serial number — if you’re unsure which screw goes where, send us your serial number and we can confirm the right part for each location. If the powerhead is coming apart for any reason, inspecting and replacing worn fasteners at this stage is far easier than dealing with a seized or damaged screw during a future service interval.
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.
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For return authorization, please contact our support team before shipping anything back.