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