Mercury MerCruiser Black Oxide Screw 438-14 x 2.060 843917
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Mercury MerCruiser 843917 is a genuine OEM black oxide screw sized .438-14 x 2.060. Current Mercury dealer references show 843917 superseded to 8M0000463, which is the current functional replacement part number.
Key Features
- Genuine Mercury Marine OEM part number 843917.
- Current replacement part number is 8M0000463.
- Size: .438-14 x 2.060.
- Finish: black oxide.
- Current dealer listing shows GTIN 745061677548.
- Current dealer shipping specs are approximately 0.13 lb, 2.50 in. x 0.75 in. x 0.75 in.
Engine Compatibility
The strongest supportable fitment for 843917 is Mercury MerCruiser high-performance big-block engine service, with current dealer where-used references specifically showing 525 EFI and 600 SCi applications. Current OEM-style parts diagrams place the replacement 8M0000463 in internal engine assemblies on those engine families.
Serial Number Fitment Notice
Verify fitment by exact engine serial number and the correct internal engine parts diagram before ordering. Current Mercury references show this screw in multiple internal assembly views, so serial-based confirmation is the safest way to match the correct screw location and replacement number.
When This Part Needs Replacement
Replace this screw when the original is damaged, corroded, stretched, rounded, or removed during internal engine service and no longer suitable for reuse. Since current parts diagrams place it in internal engine assemblies, correct size, condition, and finish matter more than appearance alone. This is a practical service inference based on its documented assembly use.
Installation Notes
Install this part only after confirming the correct Mercury MerCruiser engine diagram for the engine being serviced. Current OEM-style references place 8M0000463 in cylinder block / camshaft and crankshaft and cylinder head assemblies, where it is described as a center caps outer screw or crankshaft bearing cap screw in some layouts.
Alternate/Superseded Part Numbers
Current sources show 8M0000463 as the active replacement for 843917.
Parts Desk Insight
For internal engine hardware like this, the important match is the exact assembly location and serial-number-based diagram, not just the thread size. On 525 EFI and 600 SCi engines, a quick parts-book check is the safest way to make sure this screw is being ordered for the correct spot.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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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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