Mercury MerCruiser Quicksilver Screw M6 x 14 | OEM 4000327 | 10-4000327
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Mercury MerCruiser OEM Screw M6 x 14 — Part 4000327
- Part Number: 4000327 (Mercury catalog format: 10-4000327)
- Brand: Mercury Marine / MerCruiser / Quicksilver (Genuine OEM)
- Official Product Type: Hardware & Fasteners — Screws & Bolts
- Thread Size: M6
- Length: 14 mm (~0.55 in.)
- GTIN: 745061142091
- Application Type: Multi-application Mercury Marine fastener — appears in several unrelated assemblies
What It Does
This is the genuine OEM M6 x 14 mm screw used across a broad range of Mercury, MerCruiser and Quicksilver mechanical assemblies — from remote oil systems on big-block MerCruiser engines to power-trim pump covers and selected outboard applications. Because Mercury uses 4000327 in multiple unrelated assemblies, fitment must be confirmed by part number and diagram position, not by engine model or screw dimensions alone. An M6 x 14 from a different application may differ in head type, finish, or OEM specification.
Compatible Applications
Confirm by part number and serial-number-specific diagram before ordering. This screw appears in multiple unrelated Mercury assemblies.
- MerCruiser 496 MAG / 496 MAG H.O. — remote oil system; two M6 x 14 screws shown with the oil-cooler bracket assembly
- MerCruiser 8.1L Inboard / 8.1L H.O. — remote oil system
- MerCruiser 8.1L TowSport / 8.1L EC — remote oil configurations
- Mercury power trim / tilt assemblies — four 4000327 screws shown securing the applicable cover assembly (paired with washer 4002315, 6.60 x 12.5 x 1.5 mm)
- Zeus 3000 drive system
- Selected Mercury outboards — including older 3-cylinder, 2.5L, 3.0L, V6, and V8 outboard families where the parts catalog specifies 4000327
- Selected smaller Mercury outboards (6 HP, 45 HP, 50 HP, 100 HP series — confirm by diagram)
Not sure this is the right screw? Send us your Mercury or MerCruiser serial number and the assembly you are working on.
Part Numbers & Cross-References
- 4000327 — Mercury Marine OEM part number
- 10-4000327 — Full Mercury catalog format
- GTIN: 745061142091
No separate superseding number has been identified. Use 4000327 / 10-4000327 wherever the Mercury parts diagram specifically calls for this number.
When to Replace
Replace this screw when inspection shows:
- Damaged or stripped threads
- Rounded or damaged drive surfaces
- Significant corrosion or pitting
- Bent or distorted shank
- Damage during removal
- The applicable Mercury service procedure calls for replacement
Do not substitute generic M6 x 14 hardware in critical engine, oil-system, or trim assemblies without confirming it matches the original Mercury fastener specification for head type, finish, and material.
Installation Notes
- Confirm the diagram calls for 4000327 at this specific location before installation
- Verify screw position — do not mix with other M6 fasteners in the same assembly
- Inspect receiving threads for corrosion or damage before reinstalling
- Clean mating threads as required
- Apply thread treatment only where specified by the Mercury service manual for the applicable assembly
- Use the torque specification listed in the Mercury service manual for the engine and serial range being serviced
- In power-trim cover assemblies: pair with washer 4002315 (6.60 x 12.5 x 1.5 mm) as shown in the Mercury diagram
Parts Desk Insights
The most important thing to know about 4000327 is that it is not tied to one engine or one assembly. Mercury uses this same M6 x 14 screw across remote oil systems, power-trim covers, and a wide range of outboard applications — so ordering it because an old screw “looks the same” isn’t enough. Match the part number and diagram location. If you know the assembly you’re working on and your serial number, that’s all we need to confirm the right fastener for your specific position. The most common issue is customers receiving the correct screw but fitting it at the wrong location within the same assembly — always reference the diagram item number, not just the thread size.
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.