3804991 Engine Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for an engine, in the Engine group. It is the refundable charge raised against the old engine when the exchange unit is bought, and it comes back once the worn engine is returned. The line itself is an accounting entry rather than a part, so nothing ships against it on its own. Under Volvo Penta's core numbering the exchange unit it belongs to takes part number 3801991, which is the number to quote for the component itself. It is listed for 1 application across the D series. Engine cores 3804968, 3804986, 3804987, 3804989 and 3804990 share the same single D series application with this one and nothing published separates any of them, so order the number that matches the engine actually coming off.

🚤 Compatibility

Typically suits:

• Volvo Penta D7A 285F

• Engine Family: D

⚙️ Key Features

• Core deposit line, not an engine you can fit
• Belongs with the exchange unit, part number 3801991
• Refunded when the old engine is returned
• Not separable from the other single-application D series engine cores here, so order by part number
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the engine itself is the vessel's prime mover, turning fuel into the shaft power that drives her.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the engine being exchanged
• Hard starting, low compression and heavy blow-by from the breather
• Knocking or rumbling from the bottom end that rises with load
• Oil pressure down, with metal glitter in the oil or debris in the filter
• Coolant in the oil or oil in the coolant, with the header tank pressurising

🛠️ Service Notes

• The charge is refunded when the worn engine is returned, so keep the old unit and send it back rather than scrapping it
• Ordering this number on its own supplies no part - it goes on the order beside the exchange unit, part number 3801991
• Establish and cure the cause before the exchange unit goes in - contaminated fuel, a failed cooler or a blocked oil gallery will take the replacement out in the same way

📦 Condition

• Refundable core deposit - not a physical part