# 21665748 Retainer | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine retainer used with adapter 21665692 and protective cap 21665775 in the TAD761VE control-system installation. It locks the cap or adapter in position and prevents movement under vibration.

## 🚤 Compatibility

Typically suits:

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

-   **Engine Family:** TAD
-   **HP Range:** Approximately 250-300 HP
-   **Year Range:** Approximately 2008 - 2015

## ⚙️ Key Features

-   Genuine Volvo Penta retaining component
-   Used with adapter 21665692
-   Secures protective cap 21665775
-   Position-specific locking geometry
-   Direct replacement for a worn or missing retainer
-   Engine type: 7.15L inline six-cylinder turbocharged industrial diesel

## 🔌 Function

Locks the assigned cap or adapter into its mounted position.

## ⚠️ Common Signs of Failure

-   Cap or adapter becoming loose
-   Retainer no longer locking securely
-   Cracking or deformation
-   Loss during service
-   Intermittent control connection caused by movement

## 🛠️ Service Notes

-   Fit the retainer clean and dry unless the manual calls for lubricant, and make sure it is fully home in its groove or against its seat before the assembly is loaded
-   Renew rather than reuse a retainer that has been removed — once a spring clip or ring has been spread it loses tension and can release in service
-   Use the correct pliers or fitting tool; opening a retainer further than it needs to go, or prising it with a screwdriver, distorts it permanently
-   Check the groove or landing face for wear, burrs and scoring, and dress or renew the mating part if the retainer will no longer seat squarely
-   Where the retainer holds a rotating or spring-loaded part, confirm by hand that the assembly is captive and has the free movement the manual specifies before closing up

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21665692 - adapter
-   21665775 - protecting cap
-   21665509 - bracket
-   21688057 - screw

## 📦 Condition

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

## Details

- **Price:** 17.69 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 17.69 AUD | In stock |

## Images

- 21665748 Retainer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21665748-retainer-genuine-volvo-penta)
> Updated: 2026-10-08