# 874903 Tachometer | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta tachometer with a black face, 85 mm in diameter, weighing 0.206 kg and listed for 47 applications across D, TWD and TAD series engines. It consolidates five earlier numbers — 873998, 874012, 874497, 874496 and 874758. The white-faced 85 mm tachometer is 874928, which covers the same three engine series; face colour is what separates the two, so match the rest of the panel before ordering.

## 🚤 Compatibility

-   **Engine Family:** D, TWD, TAD

Full model list at the end of this description.

## ⚙️ Key Features

-   Black face, 85 mm in diameter
-   0.206 kg
-   Listed for 47 applications across D, TWD and TAD series engines
-   Supersedes 873998, 874012, 874497, 874496 and 874758
-   White-faced equivalent is 874928
-   85mm (Volvo assembly listing)

## 🔌 Function

Displays engine speed at the helm or control station, driven from the engine's speed signal.

## ⚠️ Common Signs of Failure

-   Needle reading zero, sticking, or pinned at full scale
-   Reading wandering or jumping while engine speed is steady
-   Panel illumination dead while the needle still works
-   Condensation or water staining behind the glass
-   Reading that disagrees with a second known-good instrument on the same engine

## 🛠️ Service Notes

-   Check the speed signal source and the instrument earth before condemning the tachometer — a bad earth reads exactly like a dead gauge
-   The 85 mm instruments share a face size, so colour and scale are what must match the rest of the panel

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   874903 → Supersedes 873998

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D12C-A MP, D12D-A MG, D12D-A MH, D12D-A MP, D12D-B MH, D12D-B MP, D12D-C MH, D12D-C MP, D12D-D MP, D12D-E MG, D12D-E MH, D12D-E MP, D12D-F MP, D12D-G MH, D12D-G MP, D12D-H MP
-   Volvo Penta D9A2J, D9A2G, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2A, D9A2C, D9A2E
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640-42VE-C
-   Volvo Penta TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642GE, TAD1642VE
-   Volvo Penta TAD1140-42VE
-   Volvo Penta TAD1150-52VE
-   Volvo Penta TAD1170-72VE
-   Volvo Penta TAD1240GE
-   Volvo Penta TAD1241GE
-   Volvo Penta TAD1242GE
-   Volvo Penta TAD1643VE
-   Volvo Penta TAD1650GE
-   Volvo Penta TAD1651GE
-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TWD1663GE
-   Volvo Penta TWD1672-1673GE

## Details

- **Price:** 1111.97 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1111.97 AUD | In stock |

## Images

- 874903 Tachometer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/874903-tachometer-genuine-volvo-penta)
> Updated: 2026-08-22