# 21157128 Shim | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta shim used with hull fitting 21155192 in IPS Active Corrosion Protection installations. It sets the correct hull-fitting stack and clamping position so the fitting, gasket and lock nut seal correctly through a fibreglass hull.

## 🚤 Compatibility

-   **Engine Family:** D, IPS
-   **HP Range:** 260-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta IPS ACP hull-fitting shim
-   Used with hull fitting 21155192
-   Works with gasket 21158077 and lock nut 971089
-   Part of complete ACP installations for twin, triple or quadruple IPS layouts
-   Shim requirement depends on hull construction and ACP kit
-   Engine type: Volvo Penta IPS marine propulsion with Active Corrosion Protection

## 🔌 Function

Sets the installed spacing and clamping position of the ACP hull fitting through the hull laminate.

## ⚠️ Common Signs of Failure

-   Water seepage around the hull fitting
-   Loose fitting or inability to obtain correct clamp load
-   Distorted or corroded shim
-   Incorrect electrode position or poor ACP electrical continuity
-   Damage to the surrounding hull laminate

## 🛠️ Service Notes

-   Shims are supplied in graded thicknesses and exist to bring a setting into specification, so measure with a micrometer and select the thickness the setting procedure for your engine calls for rather than matching one by eye
-   Note which shim came from which position on removal and keep them identified — once an assembly has bedded in, shims are not interchangeable between positions
-   Check both faces are clean, flat and free of burrs, corrosion and old sealant before fitting; dirt trapped under a shim shifts the setting as surely as the wrong thickness does
-   Discard any shim that is dished, cracked, pitted or fretted rather than reusing it, and make sure no old shim has been left behind in the recess
-   Recheck the clearance or setting after the assembly is tightened down, because clamping load can change the measurement you took loose

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21155192 - ACP hull fitting
-   21158077 - hull-fitting gasket
-   971089 - lock nut
-   21269808 - spacer screw
-   21174473 - protection kit
-   21174476 - zinc anode kit
-   22037078 - complete ACP kit references
-   22564286 - complete ACP kit references

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-330D-E, D6-370D-E, D6-330D-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-330D-F, D6-370D-F, D6-300D-F, D6-310D-D, D6-310D-C, D6-310D-E, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-435D-D, D6-435D-E, D6-435D-F, D6-435D-C
-   Volvo Penta D13C2-B MP, D13C2-A MP, D13C4-A MP, D13B-L MP, D13B-G MP, D13B-K MP, D13B-C MP, D13C6-A MP, D13C4-B MP, D13C5-B MP, D13C5-A MP, D13C8-B MP
-   Volvo Penta D4-260D-C, D4-260D-D, D4-260D-E, D4-260D-F, D4-300D-C, D4-300D-D, D4-300D-E, D4-300D-F
-   Volvo Penta D11C2-A MP, D11C4-A MP, D11B4-A MP, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP
-   Volvo Penta IPS-A, IPS-B, IPS-F, IPS-C, IPS-D, IPS-E
-   Volvo Penta D8A2-A MP, D8A4-A MP, D8A8-A MP
-   Volvo Penta IPS2-C, IPS2-A, IPS2-B
-   Volvo Penta 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q
-   Volvo Penta IPS15-B, IPS15-A
-   Volvo Penta IPS3-C, IPS3-A
-   Volvo Penta IPS10-A
-   Volvo Penta IPS20-D
-   Volvo Penta IPS30-D

## Details

- **Price:** 154.08 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 154.08 AUD | In stock |

## Images

- 21157128 Shim | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21157128-shim-genuine-volvo-penta)
> Updated: 2026-09-19