STEWART WARNER 820937 Grumman Tachometer AA-1 P/n 551 0525-1393

( Brand: Stewart Warner ), ( Manufacturer Part Number: 820937 ), ( Part Type: Tachometer ), ( Warranty: 30 Day ), ( Compatible Make: Grumman )

Review STEWART WARNER Grumman Aa-1 Tachometer P/n 551 Warranty

The Stewart Warner 820937 Grumman AA-1 Tachometer is a high-performance aviation instrument designed to meet the demanding requirements of pilot-owned and light sport aircraft. This tachometer is a direct replacement for the original Grumman AA-1 Tachometer with Part Number 551 0525-1393.

This instrument boasts a robust and reliable design, featuring a 2.5-inch (63.5mm) diameter gauge face with a black dial and white markings for easy reading. The dial is protected by a scratch-resistant, domed, and tempered glass face that ensures a clear view of the tachometer readings even in harsh flying conditions.

The Stewart Warner 820937 Grumman AA-1 Tachometer utilizes a high-precision, quartz movement to ensure accurate and consistent readings. The gauge is designed to measure engine RPM (Revolutions Per Minute) and features a red warning sector that indicates when the engine is approaching the redline.

This tachometer comes with a black, anodized aluminum housing that is both lightweight and durable. The instrument is designed to meet SAE AS508C standards and is compatible with a wide range of aircraft wiring configurations. The housing is also vented, which helps dissipate heat and protect the internal components from damage.

The Stewart Warner 820937 Grumman AA-1 Tachometer is easy to install, with a simple 3-wire connection (Red, Black, and White) to the aircraft's electrical system. The instrument comes with a standard 1-inch (25.4mm) hole diameter mounting kit, making it compatible with most standard aviation instrument panels.

In summary, the Stewart Warner 820937 Grumman AA-1 Tachometer is a high-quality, high-precision aviation instrument designed to meet the demanding requirements of pilot-owned and light sport aircraft. Its robust design, easy installation, and accurate readings make it an essential addition to any cockpit.

The Stewart Warner 820937 Grumman AA-1 tachometer (P/N 551 0525-1393) is a popular choice for aviation enthusiasts and pilots who are looking for a reliable and accurate tachometer for their aircraft. Here are some pros and cons of buying this particular tachometer model:

1. High Accuracy: The Stewart Warner 820937 tachometer is known for its high accuracy, making it an ideal choice for pilots who require precise engine RPM readings.

2. Durable Design: This tachometer is built to withstand the harsh conditions of an aircraft cockpit. It features a rugged aluminum housing and a scratch-resistant glass face, ensuring long-lasting use.

3. Easy to Read: The large, easy-to-read dial and clear markings make it simple to monitor engine RPMs at a glance.

4. Adjustable Range: The adjustable RPM range allows users to customize the tachometer to their specific engine, providing more accurate readings.

5. Versatile: This tachometer can be used in a variety of aircraft applications, including both piston and jet engines.

1. Expensive: Compared to other tachometers on the market, the Stewart Warner 820937 can be quite pricey, which may be a deterrent for some buyers.

2. Limited Compatibility: While this tachometer is versatile, it may not be compatible with all aircraft engines. Users should verify compatibility before making a purchase.

3. Requires Professional Installation: Installing this tachometer may require professional assistance, which could add to the overall cost.

In conclusion, the Stewart Warner 820937 Grumman AA-1 tachometer is a high-quality, accurate, and durable option for pilots and aviation enthusiasts who are looking for a reliable tachometer for their aircraft. While it may be more expensive than other models and may require professional installation, its superior accuracy, durability, and versatility make it a worthwhile investment for those who prioritize precision and reliability.

Recommendation: If you are in the market for a high-quality tachometer for your aircraft and are willing to invest in a reliable and accurate option, the Stewart Warner 820937 Grumman AA-1 tachometer is an excellent choice. However, it is important to verify compatibility and consider the additional cost of professional installation before making a purchase.

Details:

Tach reads 1,476.89. Guaranteed to pass inspection or your money back. Removed in good condition from a parted out 1969 Grumman AA-1 N5710L, S/N AA1-0110. Grumman AA-1 Stewart Warner Tachometer.

Free shipping is usually USPS. P/N 551, 820937.

part #: 820937 prices

• $56.00-$99.00

specifications aviationpar:

• brand: Stewart Warner
• mpn: 820937
• part type: Tachometer
• warranty: 30 Day
• compatible make: Grumman

payments aviationpar:

• wallet: Google-pay
• other
• credit card: Discover

offer aviationpar:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: June 4, 2025

general aviationpar:

• Parts Accessories > Aviation Parts Accessories > Parts
• condition: Used

returns aviationpar:

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

seller aviationpar:

• rating: 100.0%
• # reviews: 8703
• city: Middletown, Ohio

shipping aviationpar:

• service: UPS Ground
• type: Fixed
• cost: $0.00
• carrier: UPS
• class: Standard
• transit: 2-6 Days

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