Mercury MerCruiser Trim Pump Reservoir Screw O-Ring Spacer 18527
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Mercury MerCruiser Quicksilver 18527 is a genuine OEM screw with O-ring and spacer used in the power trim / tilt pump-motor assembly with the bottom-mounted reservoir, Design I (14336A8). Current Mercury dealer references list it as 10-18527 SCREW, while current OEM-style assembly breakdowns describe it more specifically as SCREW, With O-Ring And Spacer in the trim pump reservoir assembly.
Key Features
- Genuine Mercury Marine OEM part number 18527 / 10-18527.
- Current assembly references identify it as screw with O-ring and spacer.
- Used with the bottom-mounted reservoir trim pump / motor assembly, Design I - 14336A8.
- Current dealer listing shows GTIN 745061123892.
- Current dealer shipping specs are approximately 0.02 lb, 1.50 in. x 1.50 in. x 1.00 in.
Engine Compatibility
The strongest supportable fitment for 18527 is MerCruiser trim / tilt / lift system service rather than a generic engine-only application. Current application references connect it to Alpha One Gen II, R/MR/Alpha One, Bravo One, Bravo Two, Bravo Three, Blackhawk, TR/TRS, Bravo XR/XZ, and related integrated transom and race stern drive applications including Scorpion 377 Sterndrive, 500 EFI, 500 Carb (502), 500 Bulldog, and 575 SCi.
Serial Number Fitment Notice
Verify fitment by exact drive model, serial number, and the correct trim pump / motor reservoir parts diagram before ordering. With 18527, the key match is the Design I bottom-mounted reservoir pump assembly, because similar Mercury trim pump hardware can look close while serving different pump designs.
When This Part Needs Replacement
Replace this part when the existing reservoir screw, O-ring, or spacer is damaged, leaking, missing, or no longer seals the trim pump reservoir correctly. Since current assembly references place it directly at the reservoir end of the trim pump/motor assembly, renewing it during pump service is often the smarter move than reusing worn sealing hardware. This is a practical service inference based on its documented reservoir-screw role.
Installation Notes
Install 18527 only after confirming the correct Mercury MerCruiser pump/motor assembly design for the unit being serviced. Current diagrams place it with nearby parts such as the oil reservoir cap 861597 / 18526, reservoir 18525A1, O-ring 25-17645, and pump assembly 18529, so it should be matched to the exact trim pump layout during reassembly.
Alternate/Superseded Part Numbers
Current supersession references connect older Mercury OEM number 17648 to active part number 18527.
Parts Desk Insight
For small trim-pump hardware like this, the important match is the pump design and reservoir layout, not just the screw size. A quick parts-diagram check usually saves time because reservoir screws and sealing hardware can vary between trim pump versions even when they look nearly identical.
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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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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