21380910 Gasket | Genuine Volvo Penta Part

🔧 Product Description

A genuine sealing gasket fitted at the starter-motor mounting interface on Volvo Penta D4 and D6 marine diesel engines. It seals the starter flange against the engine housing, helping prevent moisture, contamination and fluid residue from entering the mounting joint.

🚤 Compatibility

• Engine Family: D
• HP Range: 145-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta starter-motor mounting gasket
• Correct profile for D4 and D6 starter installations
• Helps seal the starter flange against moisture and contamination
• Intended for replacement whenever the starter motor is removed
• Broad D4 and D6 model coverage subject to serial-number confirmation
• Engine type: Volvo Penta D4 four-cylinder and D6 six-cylinder turbocharged marine diesel

🔌 Function

Seals the starter motor to the engine housing and helps protect the starter mounting interface from moisture, corrosion and contamination.

⚠️ Common Signs of Failure

• Moisture or corrosion around the starter flange
• Oil or fluid residue at the mounting joint
• Torn, compressed or hardened gasket material
• Contamination inside the starter mounting area
• Seal damage discovered during starter removal

🛠️ Service Notes

• Fit a new gasket every time the joint is disturbed — a gasket takes a permanent set once it has been torqued and will not seal reliably a second time
• Scrape both faces back to clean bare metal, keeping the blade at a shallow angle so it lifts the old material without gouging the surface, and use a plastic scraper on aluminium castings
• Check the faces for flatness, cracks and corrosion pitting, and make sure no old gasket, carbon or hardened sealant is left in the corners or around the bolt holes
• Fit the gasket dry unless the workshop manual for your engine calls for a sealant, and then only the type it specifies — surplus sealant squeezes out into oil, coolant and fuel passages
• Draw the fasteners down progressively in the sequence and to the torque given in the manual for your engine, and recheck after the first heat cycle where the manual asks for it

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 874501 - related starter motor reference
• 874674 - related starter motor reference
• 21308512 - related insulating bushing used in the starting-system installation

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
• Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G