21342186 Flywheel | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flywheel for specified D2 compact marine-diesel engines. It supersedes flywheel 3583691 and provides the crankshaft inertia, starter ring-gear interface and drive-plate mounting required for the applicable gearbox or saildrive installation.

🚤 Compatibility

• HP Range: Approximately 50-75 HP

⚙️ Key Features

• Genuine Volvo Penta D2 flywheel
• Supersedes earlier flywheel 3583691
• Approximate mass: 25.58 kg
• Provides starter ring-gear and drive-plate interface
• Match gearbox/saildrive, flywheel housing and engine serial number
• Engine type: Volvo Penta D2 four-cylinder compact marine diesel

🔌 Function

Stores rotational energy, carries the starter ring gear and transfers crankshaft torque to the drive plate or transmission coupling.

⚠️ Common Signs of Failure

• Abnormal vibration or run-out
• Damaged ring-gear teeth causing starter engagement problems
• Cracks, heat checking or fretting at the mounting face
• Loose or elongated bolt holes
• Clutch, damper or drive-plate alignment problems

🛠️ Service Notes

• Inspect the ring gear teeth for chipping, burring and one-sided wear before refitting — a damaged tooth ring will chew up a new starter pinion
• Check the clutch or damper mating face for scoring, heat cracking and blueing, and check the crankshaft rear seal and any spigot bearing while access is good
• Clean the crankshaft flange and the flywheel face so both are dry and free of oil, old sealant and burrs; a trace of oil on that joint is enough to let the flywheel work loose
• Locate the flywheel the correct way round on its dowel or locating feature, and renew the bolts wherever the manual calls them single-use
• Tighten the bolts progressively in a criss-cross pattern to the figure and stages given in the workshop manual for your engine, and never lever against the ring gear teeth to hold it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21342186 → Supersedes 3583691

OEM / Related Numbers

• 3583691 earlier number superseded by this part

📦 Condition

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