# 21088545 Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Brand-new genuine Volvo Penta insulating cap for the starter-motor battery-cable connection on selected TAD5 and TAD7 engines. It covers the live main terminal after cable installation, reducing the risk of accidental short circuit, corrosion and conductive contamination.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD765VE
-   Volvo Penta TAD764VE
-   Volvo Penta TAD763VE
-   Volvo Penta TAD762VE
-   Volvo Penta TAD761VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Insulates the exposed starter B+ terminal
-   Flexible boot shape fits the factory starter-cable lug
-   Protects against moisture, oil mist and accidental tool contact
-   Used with starter cable 21312943
-   One protective cap supplied; cable and starter motor are separate
-   Engine type: Volvo Penta 5- and 7-litre industrial diesel, 24-volt starting system

## 🔌 Function

Covers and electrically insulates the high-current starter terminal while shielding the connection from moisture and debris.

## ⚠️ Common Signs of Failure

-   Cap split, hardened or missing
-   Exposed live terminal capable of shorting to ground
-   Green corrosion or moisture at the cable lug
-   Heat damage caused by a loose high-resistance connection
-   Intermittent cranking from a contaminated or corroded terminal

## 🛠️ Service Notes

-   Clean and inspect the seating face on the housing as well as the cap — most leaks past a cap are the seat or the seal rather than the cap body
-   Renew any separate O-ring or gasket that goes with the cap, and lubricate rubber seals lightly with clean oil or grease so they slide home instead of rolling or tearing
-   Do not over-tighten a cap into a plastic or aluminium housing; it seals on its gasket or O-ring, not on force, and stripped threads mean a much bigger repair
-   Where a cap blanks a port during a repair, keep it fitted right up to the moment of assembly so nothing enters the opening
-   Check the cap is fully home and that any retaining clip, lanyard or locking tab is secure before returning the boat to service

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   Starter cable 21312943

### Other-Brand OEM Numbers

-   VOE21088545

## 📦 Condition

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

## Details

- **Price:** 2.87 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2.87 AUD | In stock |

## Images

- 21088545 Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21088545-cap-genuine-volvo-penta)
> Updated: 2026-08-22