# 21103718 Starter Motor | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta 24-volt, 7.5 kW heavy-duty starter motor used on D12 and TAD/TWD12 marine, generator and industrial engines. The three-bolt reduction starter uses a clockwise 12-tooth drive and a 92 mm mounting spigot. Its high output is matched to the compression and flywheel ring gear of the 12-litre engine family.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1240VE
-   Volvo Penta TAD1241GE
-   Volvo Penta TAD1242GE
-   Volvo Penta TAD1240GE
-   Volvo Penta TAD1241VE
-   Volvo Penta TAD1242VE
-   Volvo Penta TAD1241-42VE

-   **Engine Family:** TWD, TAD

## ⚙️ Key Features

-   24-volt, 7.5 kW reduction starter motor
-   Clockwise rotation with 12-tooth pinion
-   Three-bolt mounting and approximately 92 mm locating spigot
-   High-torque design for 12-litre Volvo Penta diesel engines
-   Engine type: 12-litre inline-six diesel, 24-volt starting system
-   Also supersedes Volvo part number 3803923

## 🔌 Function

Engages the flywheel ring gear and cranks the engine at the speed required to develop compression heat and begin fuel combustion.

## ⚠️ Common Signs of Failure

-   Slow or laboured cranking with correct battery voltage
-   Solenoid engagement without armature rotation
-   Grinding or incomplete pinion engagement
-   Excessive starter current and hot battery cables
-   Intermittent operation from worn brushes, contacts or armature components

## 🛠️ Service Notes

-   Disconnect the batteries before touching starter cables, and label the main and control connections as they come off
-   Inspect the ring gear teeth before fitting a new motor; a chipped or worn ring gear will ruin the new pinion
-   Mount the motor square on clean faces with whatever shims the installation uses, so pinion engagement matches what the workshop manual for your engine specifies — never leave shims out to make it fit
-   Clean the main and earth terminals back to bright metal, tighten to the specified figure and refit the insulating boots; a great many failed starters are really voltage drop in the cables and earth path
-   Crank with the engine unable to start first, listening for clean engagement and release, then feel the terminals for heat after several attempts

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21103718 → Supersedes 3586798

### OEM / Related Numbers

-   3801288 earlier number superseded by this part
-   3586798 related reference
-   3801289 related reference
-   3803838 related reference
-   3827444 related reference
-   874385 related reference
-   M009T84079 related reference

### Other-Brand OEM Numbers

-   Mitsubishi M009T82179 / M9T82179
-   Prestolite M105R3513SE
-   MAHLE: MS 1032
-   Delco Remy 19081032 / DRS0546
-   Mitsubishi Electric: M009T84079
-   Mitsubishi Electric: M9T84079
-   Prestolite: M105713

### Aftermarket / Verified Equivalents

-   Delco Remy: DRS0546
-   Delco Remy: 19081032
-   WAI: 84079
-   HC-Cargo: 114729
-   PSH: 811.509.123
-   AS-PL: S5062
-   Remy: DRS0546
-   Elstock: 455403

## 📦 Condition

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

## Details

- **Price:** 2436.58 AUD
- **Vendor:** Volvo Penta
- **Type:** Starters & Starting
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2436.58 AUD | In stock |

## Images

- 21103718 Starter Motor | Genuine Volvo Penta Part
- 21103718 Starter Motor | Genuine Volvo Penta Part - photo 2 of 2

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21103718-starter-motor-genuine-volvo-penta)
> Updated: 2026-10-08