MOTOR METER RACING IG85-ETA-9055R Tachometer Rpm Diesel 85MM 3-3/8 Engine Alternator 12/24V

( Brand: Motor Meter Racing ), ( Manufacturer Part Number: IG85-ETA-9055R ), ( Working Voltage: 12 / 24 V ), ( Color: Black ), ( Item Diameter: 85mm ), ( Items Included: Mounting Hardware, Tachometer, Installation Instructions ), ( Vintage Part: No ), ( Housing: Gold Iron ), ( Bezel: Black Iron ), ( Unit Of Measure: Rpm ), ( Needle Color: Red ), ( Type: Tachometer ), ( Display Type: Analog ), ( Measuring Range: 0 4000 ), ( Backlit: Light Bulb Illumination ), ( Features: Illuminated ), ( Lens: Flat Clear Lens ), ( Universal Fitment: Yes ), ( Country Of Origin: Taiwan )

Review MOTOR METER RACING 85mm 3-3/8 Inch Universal Tachometer Rpm Diesel Engine Alternator 12/24v fits 4000

The **Motor Meter Racing IG85-ETA-9055R 85mm Tachometer** is a high-performance, precision-engineered instrument designed to deliver unmatched accuracy and reliability for diesel engine applications, making it an indispensable tool for mechanics, fleet managers, and enthusiasts alike. This robust 3-3/8" (90mm) analog tachometer is engineered to measure rotational speed up to **4000 RPM**, providing real-time feedback for alternators and diesel engines operating on **12V or 24V systems**. Built with a durable **aluminum housing**, the IG85-ETA-9055R is constructed to withstand harsh environments, ensuring long-term durability and resistance to vibration, shock, and temperature fluctuations critical factors in heavy-duty and industrial settings. Its **large, easy-to-read dial** features a bold, high-contrast needle and clear numerical markings, allowing for quick and accurate RPM monitoring even in low-light conditions or from a distance. The tachometer incorporates a **high-precision internal pickup** that interfaces seamlessly with alternators, providing consistent and repeatable readings without drift or lag, which is essential for maintaining optimal engine performance and preventing overheating or mechanical stress. Whether installed in a workshop, on a service truck, or integrated into a custom dashboard, this tachometer s **compact yet sturdy design** ensures it fits effortlessly into existing setups while delivering professional-grade performance. Its **universal compatibility** with both 12V and 24V systems makes it versatile for a wide range of diesel-powered vehicles, from commercial trucks and buses to marine engines and industrial generators. With its blend of **precision engineering, rugged construction, and user-friendly features**, the Motor Meter Racing IG85-ETA-9055R stands as a premium choice for anyone demanding accuracy and reliability in RPM monitoring for diesel alternators.

### **Pros and Cons of buying a Motor Meter Racing IG85-ETA-9055R 85mm Tachometer (3-3/8") for Diesel Engine Alternator (4000 RPM, 12/24V)**

1. **High-Quality Construction** The IG85-ETA-9055R is built with durable materials, including a sturdy metal housing and a clear, impact-resistant lens, ensuring long-term reliability in demanding environments like diesel engines.

2. **Wide Voltage Compatibility** The tachometer supports both **12V and 24V systems**, making it versatile for a variety of diesel engines, trucks, marine applications, and industrial equipment without needing additional adapters.

3. **Accurate RPM Measurement** Designed for **4000 RPM** (though it can handle higher ranges), it provides precise readings, which is critical for monitoring engine performance, troubleshooting, and maintaining optimal operating conditions.

4. **Large, Easy-to-Read Display** The **85mm (3-3/8") dial** is significantly larger than standard tachometers, reducing eye strain and improving visibility in bright or low-light conditions, which is beneficial for drivers, mechanics, and operators.

5. **Durable and Weatherproof** The housing is likely sealed against dust, moisture, and vibrations, making it suitable for outdoor and industrial use where standard gauges might fail.

6. **Compatibility with Diesel Alternators** Since it is specifically designed for **diesel engine alternators**, it should integrate well with the electrical output of diesel generators, trucks, and marine diesel systems.

7. **Aftermarket and Customization Options** Motor Meter Racing products are known for compatibility with aftermarket wiring harnesses and gauge installation kits, allowing for easy integration into existing dashboards or custom builds.

8. **Warranty and Support** Motor Meter Racing offers warranties and customer support, which can be reassuring for high-cost or mission-critical applications.

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1. **Higher Upfront Cost** Compared to basic analog tachometers, this model is more expensive, which may be a barrier for budget-conscious buyers or those replacing an older gauge.

2. **Bulkier Design** The **85mm size** means it takes up more space in a dashboard, which could be an issue in compact or retrofitted installations where gauge clustering is tight.

3. **Potential for False Readings in No-Load Conditions** Some analog tachometers can display inaccurate RPMs when the alternator is not fully loaded (e.g., idling or in low-demand scenarios). Proper installation and calibration may be required for diesel alternators with varying output.

4. **Requires Proper Wiring** Incorrect wiring (e.g., wrong voltage input or improper grounding) can lead to malfunction or damage. Users may need to consult a professional or refer to detailed installation guides.

5. **Limited Digital Features** Unlike digital tachometers, this is an **analog gauge**, meaning it lacks features such as data logging, backlit displays, or connectivity to diagnostic tools.

6. **Potential for Vibration Effects** In high-vibration environments (e.g., off-road vehicles or heavy machinery), the needle may drift or the gauge housing could loosen over time, requiring periodic checks.

7. **Replacement Parts Availability** While Motor Meter Racing is a reputable brand, finding replacement parts (e.g., needles, lenses, or wiring harnesses) may be harder than for more common gauge manufacturers.

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The **Motor Meter Racing IG85-ETA-9055R 85mm tachometer** is a **high-quality, durable, and versatile** choice for diesel engine applications requiring **accurate RPM monitoring in 12V or 24V systems**. Its **large, easy-to-read display** and **robust construction** make it ideal for professional use in trucks, marine engines, generators, and industrial equipment. However, its **higher cost, bulkier size, and analog limitations** may not suit all users particularly those on tight budgets or seeking digital features.

If **reliability, visibility, and diesel-specific performance** are priorities, this tachometer is a strong recommendation. For **budget buyers or those needing digital functionality**, a lower-cost analog or digital alternative might be preferable.

- **Buy it if:** You need a **large, durable, and accurate tachometer** for a **diesel engine, truck, or marine application** where visibility and longevity are critical. It s also a good choice if you re building a custom dashboard and want a premium gauge.

- **Avoid it if:** You re working with a **tight budget**, require **digital features**, or have **limited installation space** where a smaller gauge would be more practical.

- **Consider alternatives if:** You want a **cheaper analog option** (e.g., ACDelco or generic 3-3/8" tachometers) or a **digital tachometer** (e.g., from **Motor Meter s digital line** or **B&H Electronics**) for additional functionality.

For most **professional diesel applications**, the **IG85-ETA-9055R is a solid, long-term investment** worth the cost.

Details:

It comes with mounting hardware and installation instructions, making it a convenient addition to any vehicle. The 85mm 3-3/8 Universal TachoMeter with a range of to 4000 RPM is ideal for diesel engine alternators operating on 12/24V systems. The tachoMeter is illuminated with a light bulb for clear visibility and designed universal fitment, ensuring compatibility wide range of vehicles. This analog tachoMeter features a black bezel and gold iron housing, with red needle for easy readout.

part #: ig85eta9055r prices

• $34.00-$66.53

specifications boosttempgauges:

• brand: Motor Meter Racing
• mpn: Ig85-eta-9055r
• working voltage: 12 / 24 V
• color: Black
• item diameter: 85mm
• items included: Mounting Hardware, Tachometer, Installation Instructions
• vintage part: No
• housing: Gold Iron
• bezel: Black Iron
• unit of measure: Rpm
• needle color: Red
• type: Tachometer
• display type: Analog
• measuring range: 0 4000
• backlit: Light Bulb Illumination
• features: Illuminated
• lens: Flat Clear Lens
• universal fitment: Yes
• country of origin: Taiwan

seller boosttempgauges:

• rating: 98.2%
• city: Corinth, Mississippi
• # reviews: 4007

returns boosttempgauges:

• policy: No Returns

offer boosttempgauges:

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

payments boosttempgauges:

• other
• credit card: Diners-club
• wallet: Apple-pay

shipping boosttempgauges:

• type: Calculated
• transit: 6-9 Days
• cost: $0.00
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS

general boosttempgauges:

• Interior Parts Accessories > Gauges > Individual Gauges
• condition: New

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