Volvo Penta Magnetic Plug 852904
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Volvo Penta 852904 is a genuine OEM magnetic plug used in Volvo Penta sterndrive and marine propulsion applications. Volvo Penta's official parts catalog identifies part 852904 as “magnetic plug,” and current parts sources commonly describe it as a magnetic gearcase or oil drain plug used to help collect fine metallic particles during service. Current seller references also associate this number with earlier part 839354.
Key Features
- Genuine Volvo Penta OEM part number 852904.
- Official Volvo Penta description: magnetic plug.
- Magnetic design helps capture metallic debris in the lubricated assembly during service inspection.
- Commonly sold with an O-ring in current replacement-market listings.
- Current source references also link this part with earlier Volvo Penta number 839354.
Engine Compatibility
Current public references connect Volvo Penta 852904 to a broad range of older Volvo Penta marine applications, including AQ270, AQ275, AQ280, AQ290/AQ290A, and 2001, 2001B, 2002, 2002B, 2002D, 2003, 2003B, 2003D, 2003T, and 2003TB families, along with DP and SP configurations in current seller listings. Because plugs can vary by housing and production break, fitment should still be treated as engine- and drive-specific and verified to the exact serial-numbered unit.
Serial Number Fitment Notice
Always confirm 852904 against the exact engine or drive serial number and the correct Volvo Penta parts diagram before ordering. That is the safest way to match the magnetic plug to the correct housing and sealing arrangement.
When This Part Needs Replacement
Replace this magnetic plug when the plug is damaged, the sealing surface is worn, the threads are compromised, the magnet is weakened or contaminated, or the O-ring no longer seals reliably. It is also a smart replacement when servicing a gearcase or related oil cavity if the original plug shows corrosion or sealing wear.
Installation Notes
Install only in the correct matched Volvo Penta application. Inspect the housing threads, sealing surface, and O-ring condition before reassembly, and clean any collected metallic debris from the magnetic tip during service. On drain plugs like this, a clean sealing surface is important for leak-free reinstallation. The debris-cleaning and sealing guidance is practical service advice supported by the plug's magnetic drain function.
Alternate/Superseded Part Numbers
Current sources reviewed associate Volvo Penta 852904 with earlier number 839354. Some aftermarket listings also use equivalent-style references based on 852904, but cross references should always be matched carefully to the exact application before use.
Parts Desk Insight
A magnetic plug is a small part, but it can tell you a lot during service. Checking the amount and type of metallic material collected on the plug during oil changes can help spot abnormal wear early, especially on older sterndrive and gearcase applications. That makes replacing a worn plug and keeping the magnetic tip clean a smart part of routine maintenance.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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