1. Boat Outboard Engines To Buy
  2. sku: 23632318370478751
  3. MERCURY 79-79786A4

MERCURY 79-79786A4 Quicksilver Power Gauge Kit P/n 79-7925339A B412

fits make: Mercury.

79-7925339a Mercury 79-79786a4 New In Package Quicksilver P/n 2 Power Trim Gauge Kit B412

( Manufacturer Part Number: 79-79786A4 ), ( Part Type: Gauge ), ( Country Of Origin: United States )

Review MERCURY New In Package Quicksilver P/n Power Trim Gauge Kit

The **Mercury 79-79786A4 Quicksilver Power Gauge Kit (P/N 79-7925339A, B412)** is a high-performance, factory-original accessory designed exclusively for Mercury outboard engines, offering precise real-time monitoring of critical electrical parameters to optimize power delivery and protect your engine from potential damage. Engineered with Mercury s signature precision and reliability, this gauge kit is a seamless integration for the **Quicksilver series**, particularly models equipped with electronic fuel injection (EFI) systems, where accurate voltage, current, and battery health data are essential for maintaining peak performance. The kit features a **B412 power gauge**, a sleek, analog-style display that combines the functionality of a voltmeter, ammeter, and battery condition monitor into a single, easy-to-read unit. Positioned strategically on the dashboard or console, the gauge provides instant feedback on electrical system health, allowing operators to monitor voltage levels during startup, load conditions, and runtime, ensuring the battery remains within the optimal charging range while preventing overcharging or deep discharging both of which can shorten battery life and compromise engine performance. Beyond basic voltage and current readings, the gauge kit includes a **battery condition indicator**, which uses advanced algorithms to assess the overall health of the battery, alerting users to potential issues such as sulfation or reduced capacity before they lead to failure. This proactive monitoring is particularly valuable for boaters who rely on their outboards for extended trips, as it helps prevent unexpected power loss or engine stalling due to electrical malfunctions. The installation process is designed to be straightforward, with clear wiring diagrams and compatible connectors that align with Mercury s wiring harnesses, ensuring a clean and professional fit without the need for extensive modifications. Whether used on a high-performance cruiser, a fishing vessel, or a recreational boat, this power gauge kit enhances operational efficiency by providing data-driven insights that empower operators to make informed decisions about engine load, battery management, and overall electrical system maintenance. By integrating seamlessly with the engine s existing electronics, the Mercury 79-79786A4 Quicksilver Power Gauge Kit is not just an accessory it s a vital tool for maximizing the lifespan of your outboard and ensuring consistent, reliable power whenever you re on the water.

### **Pros and Cons of buying a Mercury 79-79786A4 (Quicksilver) Power Gauge Kit (P/N 79-7925339A, B412)**

#### **Pros:**

1. **Compatibility with Mercury Outboards** This gauge kit is specifically designed for Mercury outboards, particularly older models like the Quicksilver series (e.g., 79-79786A4). It ensures proper integration with the engine s electrical system, reducing the risk of compatibility issues.

2. **Accurate Performance Monitoring** The kit includes essential gauges (likely RPM, engine temperature, and possibly fuel pressure or oil pressure) that help operators monitor engine health in real time. This can prevent overheating, mechanical failure, or fuel-related issues, especially during extended use.

3. **Retro or Classic Boat Restoration** If you own a vintage Mercury-powered boat, this gauge kit may be a factory or OEM replacement part, preserving the original aesthetic and functionality of the vessel. Restoring classic boats with authentic components enhances their value and appeal.

4. **Reliability of Mercury Parts** Mercury Marine has a long-standing reputation for durable marine engine components. While this gauge kit is older, it is likely built to withstand marine environments, including saltwater corrosion and vibration.

5. **Ease of Installation (for Compatible Models)** Since it is an OEM or direct replacement part, installation may be straightforward if the wiring and mounting points align with the boat s existing setup. Instructions (if available) should guide the process.

6. **Cost-Effective for Older Boats** For vintage or high-mileage boats, this kit may be more affordable than modern alternatives, making it a practical choice for budget-conscious owners who prioritize functionality over cutting-edge features.

7. **Functionality Over Frills** Unlike newer gauge kits with digital displays or Bluetooth connectivity, this analog kit focuses on core performance metrics. If you prefer simplicity and don t need advanced diagnostics, it may suffice.

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#### **Cons:**

1. **Age-Related Wear and Availability** Being an older part (likely from the late 1970s or early 1980s), the gauge kit may show signs of wear, such as cracked dials, faded markings, or degraded wiring. Finding replacement parts or a fully functional unit could be challenging, depending on the seller.

2. **Potential for Counterfeit or Rebuilt Units** Due to its age, there is a risk of purchasing a refurbished, rebuilt, or counterfeit version. Without thorough inspection or verification from a trusted seller, you may end up with a non-functional or unreliable kit.

3. **Limited Modern Features** Analog gauges lack digital readouts, data logging, or alerts for critical thresholds (e.g., low oil pressure). Modern alternatives offer more precise monitoring and troubleshooting capabilities, which may be preferable for safety-conscious operators.

4. **Compatibility with Modified or Aftermarket Systems** If your boat has undergone modifications (e.g., upgraded wiring, aftermarket gauges, or electronic controls), this OEM kit may not integrate seamlessly. You might need additional adapters or adjustments.

5. **Maintenance and Calibration Needs** Analog gauges require periodic calibration to ensure accuracy. Over time, the needles or internal mechanisms may drift, leading to unreliable readings. This adds maintenance overhead compared to digital gauges, which often self-calibrate.

6. **Limited Support and Warranty** Older parts typically come with no warranty or minimal support. If issues arise, troubleshooting or replacements will rely on third-party mechanics or eBay sellers, which can be time-consuming and costly.

7. **Aesthetic Mismatch with Modern Boats** If your boat has been updated with contemporary features (e.g., LED lighting, digital dashboards), the vintage look of this gauge kit may feel out of place, detracting from the overall design.

8. **Potential for Hidden Damage** Without a physical inspection, you may unknowingly purchase a kit with internal damage (e.g., corroded wiring, broken needles, or cracked housings). Always request photos or a return policy if buying online.

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### **Conclusion:**

The Mercury 79-79786A4 Power Gauge Kit is a **practical choice for vintage boat owners** who prioritize authenticity, simplicity, and compatibility with older Mercury outboards. It excels in providing basic but critical performance monitoring for classic boats where modern upgrades aren t desired. However, its **age, potential unreliability, and lack of advanced features** make it less ideal for boats requiring cutting-edge diagnostics or long-term durability without maintenance.

If you re restoring a classic boat and can source a **tested, high-quality unit** (preferably with a return policy or seller warranty), this kit could be a worthwhile investment. For modern or heavily modified boats, a **digital or hybrid gauge system** (e.g., Raymarine, Simrad, or aftermarket analog-digital hybrids) would offer better reliability and functionality.

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### **Recommendation:** 1. **If restoring a classic Mercury boat:**

- Purchase from a **reputable seller** (e.g., eBay with positive feedback, specialty marine parts dealers, or auction sites like Boat Trader).

- **Inspect thoroughly** for cracks, corrosion, or functional gauges. Request photos or a video demonstration if buying online.

- Consider pairing it with **modern wiring harnesses or protective coatings** to extend its lifespan.

- Budget for **potential refurbishment** (e.g., cleaning dials, replacing wiring) if the unit is worn.

2. **If using on a modern or modified boat:**

- **Avoid this kit** unless you re certain it will integrate perfectly. Opt for a **universal or OEM-compatible digital gauge** (e.g., Mercury s own newer models or third-party brands like B&G or Lowrance) for better accuracy and features.

3. **Alternative Options:**

- **Universal Analog Gauges:** Brands like **B&G, Raymarine, or Marine Instruments** offer retro-styled analog gauges that may fit better with modern setups while providing reliability.

- **Digital Gauge Kits:** For safety and convenience, consider **Raymarine s Axiom or Simrad s NSS series**, which offer RPM, temperature, and fuel monitoring with digital precision.

- **Hybrid Systems:** Some aftermarket kits combine analog and digital elements (e.g., analog dials with digital backlights or alerts).

4. **Final Verdict:**

- **Buy the Mercury kit only if** you re committed to a classic setup, have verified its condition, and accept its limitations.

- **Skip it for** modern boats or if you want advanced monitoring opt for a newer, more robust gauge system instead.

Details:

part #: 7979786a4 prices

  • $19.99-$29.99

specifications ouboaen:

  • for makes: Mercury
  • mpn: 79-79786a4
  • part type: Gauge
  • country of origin: United States

payments ouboaen:

  • wallet: Paypal
  • credit card: Diners-club
  • other

general ouboaen:

  • condition: New
  • Boat Parts > Outboard Engines Components > Trim Tilt

returns ouboaen:

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

seller ouboaen:

  • city: Toms River, New Jersey
  • # reviews: 8725
  • rating: 99.9%

offer ouboaen:

  • sold: 0
  • quantity: 1
  • started: April 30, 2026
  • availability: In Stock
  • options: Ship-to-home

shipping ouboaen:

  • cost: $0.00
  • transit: 5-11 Days
  • service: USPS Ground Advantage
  • carrier: USPS
  • type: Calculated
  • class: Standard
for makes: mercury, part type: gauge, country of origin: united states,
category: boat parts > outboard engines components > trim tilt, sku: 23632318370478751,
Mercury 79-79786A4 Is Similar To:
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2 offers $19.99–$29.99 USD
  • New other (see details). Offer #1 priced at $19.99 + $0.00 shipping estimate = $19.99* total. QUICKSILVER MERCURY POWER TRIM GAUGE KIT NOS.FREE SHIPPING
  • New. Offer #2 priced at $29.99 + $0.00 shipping estimate = $29.99* total. FROM A CLOSED MARINA.FREE SHIPPING

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