MERCURY 87-99525A Quicksilver Switch Cover Nos EB1-3

( Manufacturer Part Number: 87-99525A ), ( Part Type: Switch Cover Stop ), ( Warranty: 90 Day ), ( Country Of Origin: United States )

Review MERCURY Quicksilver Stop Switch Cover Nos

The **Mercury 87-99525A Quicksilver Switch Cover (NOS EB1-3)** is a meticulously preserved, factory-new original equipment (NOS) component designed to enhance the reliability and performance of Mercury outboard motors from the early 1980s through the late 1990s. This high-quality switch cover, crafted from durable, corrosion-resistant materials, is engineered to protect the internal wiring and switches of the EB1, EB2, and EB3 engine series, ensuring seamless operation while maintaining a sleek, professional appearance. The Quicksilver switch cover features a polished, silver-toned finish that not only complements the classic aesthetic of Mercury s iconic outboards but also resists tarnishing, making it ideal for both marine and storage environments. Its precise fitment ensures a snug seal, preventing moisture and debris from infiltrating the electrical system, which is critical for preventing shorts, corrosion, and long-term damage. Whether used as a restoration piece for vintage engines or as a replacement for modern outboards requiring authenticity, this switch cover exemplifies Mercury s commitment to precision engineering and durability. For collectors, enthusiasts, and mechanics alike, the 87-99525A represents a rare, unaltered piece of automotive history, offering both functional integrity and timeless craftsmanship.

**Pros and Cons of buying a Mercury 87-99525A (Quicksilver Switch Cover, NOS EB1-EB3)**

1. **Original Equipment (NOS) Quality** The switch cover is new-old-stock (NOS), meaning it is factory-fresh or nearly so, with minimal wear. This ensures better reliability and performance compared to aftermarket or used parts.

2. **Direct Fit for Mercury EB1-EB3 Engines** Designed specifically for Mercury outboard motors from the EB1 to EB3 series, ensuring proper alignment and functionality without modifications.

3. **Durability and Weather Resistance** Mercury components are built to withstand harsh marine conditions, including saltwater exposure, UV rays, and temperature fluctuations.

4. **Easy Installation** The switch cover is a straightforward replacement part, requiring minimal tools and time to install, especially if you re familiar with basic engine maintenance.

5. **Compatibility with Modern Systems** Even though it s an older part, it should work seamlessly with modern ignition and electrical systems in EB1-EB3 engines, assuming the wiring and connections are intact.

6. **Reliability for Critical Functions** The switch cover houses essential controls (like ignition, start, and throttle), so a high-quality NOS part reduces the risk of electrical failures or malfunctions.

7. **Resale Value** NOS parts retain better value than used or aftermarket alternatives, which can be useful if you ever decide to sell the engine or boat.

1. **Age-Related Wear (Despite Being NOS)** While NOS means it hasn t been installed, the part may still show signs of age (e.g., slight discoloration, minor wear on gaskets or seals). However, this rarely affects functionality.

2. **Potential for Counterfeit Parts** NOS listings can sometimes be faked, so purchasing from a reputable dealer (e.g., Mercury-authorized suppliers, eBay verified sellers, or marine specialty shops) is crucial to avoid counterfeit or reconditioned parts.

3. **Limited Availability** Older NOS parts like this may not be as widely stocked as newer components, which could lead to longer wait times or higher prices.

4. **No Warranty (Unless Purchased from Authorized Dealer)** NOS parts typically come without a warranty unless bought through an official dealer, leaving you responsible for any defects.

5. **Compatibility with Modified Engines** If your EB1-EB3 engine has been heavily modified (e.g., custom wiring, aftermarket controls), the stock switch cover may not integrate perfectly, requiring additional work.

6. **Cost Compared to Aftermarket** NOS parts are often more expensive than aftermarket alternatives, which might not offer the same quality but could be a budget-friendly option.

7. **Potential for Stock Issues** Mercury has discontinued some older parts, so finding a genuine NOS unit may require sourcing from collectors or specialized inventory.

The **Mercury 87-99525A Quicksilver Switch Cover (NOS, EB1-EB3)** is a **high-quality, reliable replacement part** for older Mercury outboards, ideal if you prioritize authenticity, durability, and ease of installation. It s particularly valuable for restorations or maintaining original functionality. However, the **higher cost, potential counterfeit risks, and limited availability** mean it may not be the best choice for budget-conscious buyers or those who can easily source aftermarket equivalents.

- You re restoring or preserving an original EB1-EB3 engine and want genuine NOS parts.

- You trust the seller (preferably an authorized Mercury dealer or a well-reviewed NOS specialist).

- You re willing to pay a premium for reliability and compatibility.

- You plan to keep the boat long-term and want to avoid future issues with aftermarket parts.

- You re on a tight budget and can find a functional used or aftermarket switch cover.

- You re unsure about the seller s authenticity opt for a verified dealer or a trusted marine parts supplier.

- Your engine has been heavily modified, and you may need additional wiring or adjustments.

For the best experience, **purchase from a reputable source** (e.g., Mercury s official parts catalog, MarineMax, or a trusted NOS dealer) and verify the part s authenticity before buying. If possible, compare it to a known genuine NOS unit to confirm its condition.

Details:

part #: 8799525a prices

• $11.99-$14.50

specifications ouboaen:

• for makes: Mercury
• mpn: 87-99525a
• part type: Switch Cover Stop
• warranty: 90 Day
• country of origin: United States

shipping ouboaen:

• type: Calculated
• transit: 4-10 Days
• service: USPS Ground Advantage, UPS Ground Saver, UPS Ground, USPS Priority Mail
• class: Standard, Economy, Expedited
• carrier: USPS, UPS
• cost: $0.00

offer ouboaen:

• sold: 0
• availability: In Stock
• quantity: 2
• options: Ship-to-home
• started: February 24, 2026
• best offers: True

general ouboaen:

• Boat Parts > Outboard Engines Components > Electrical Systems
• condition: New other see details

payments ouboaen:

• credit card: Discover
• other
• wallet: Paypal

seller ouboaen:

• # reviews: 1641
• rating: 100.0%
• city: Auburn, Washington

returns ouboaen:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

Mercury 87-99525A Is Similar To:

• 42712a 86689a 42712a 86689a Mercury 25hp Switch (33% similar) I,m selling a used mercury switch box...(April 16th, 2017)
• 000123 Mercury Fuel Filter Safety Change Lot Nip Nos Nla (44.4% similar) ...(May 4th, 2018)
• 10-38055 Mercury Lot Of Oem Outboard Hinge Plate Screws Quicksilver New (34.8% similar) This fee covers the initial shipping cost regardless of label free. Lot of 4 oem mercury outboard hinge plate screws - quicksilver please verify compatibility before purchase...(February 21st, 2019)
• 10-67751 Mercury Nos Oem Mercruiser (25% similar) If not, let us know and we'll try our hardest to reply within one working day. Some parts may have worn or missing packaging PORTSIDEMARINE1 16:42:42:53. Any questions. PORTSIDEMARINE1 nos oem mercury Mercuries hex cap bolt screw transom bracket lot 804 new old stock item in original packaging. New ...(February 16th, 2018)
• 10-79953q04 Mercury Quicksilver Oem Gearcase 745061741706 (42.4% similar) Set of 4 free shipping all reasonable offers considered. New in package...(October 4th, 2017)
• 100-819748a Forace Mercury Marine Force Top Cowl Hood Cover (35% similar) Top of cowl has some normal fading from sun. It is in good used condition, and shows normal signs of wear. No major damage or defects noted on this cowl. Good used top cover cowl from a 1993 force 50 hp outboard...(May 13th, 2018)
• 10238367 Mercury Outboard Cylinder Head Block Water Jacket Cover (33.6% similar) Used cover from a 1978 mercury 115 horsepower 6 cylinder outboard boat motor...(February 1st, 2019)
• 11-52901 52901 Quicksilver Mercury Mariner Outboard Steel Flywheel Nut New Oem (37.4% similar) This part is in excellent shape and original packaging for pictures. Nut: SH9N this listing is for new quicksilver outboard stern drive steel flywheel. Boat equipment, trolling motor parts: Minn Kit motor guide, outboard Yamaha, eventide, Johnson mercury, stern drive MC, Mercuries, Volvo pent, depth...(March 27th, 2018)
• 1100 Mercury Nos Outboard Piston And Rings (25.2% similar) Parts are new in the box. Box has shelf wear. 015 oversize 1100 serial numbers thru 2314955GM1217178. Mercury part no 2740A2 see pics...(February 7th, 2019)
• 114-7452k Cdi Switch Box For Mercury Marine Outboard Two Cylinder Used (27.5% similar) CID 114-7452K 1 switch box for mercury marine outboard two cylinder used. Please scroll down for large photos. Please for shipping quote. Shipping quotes are for the USA lower 48 states only. This is a used shelf spare. This offer is for a CID 114-7452K 1 switch box mercury marine outboard two ...(September 4th, 2018)
• 114-7778 Cdi Switch Box Mercury Marine Outboard Hp New 736983850706 (31.3% similar) This offer is for a CID switch box mercury marine outboard 250 hp. CID switch box mercury marine outboard 250 hp new. Please for shipping quote. Please scroll down for large photos. Shipping quotes are for the USA lower 48 states only...(September 4th, 2018)