Volvo Penta Brass Pipe Plug 1/4 NPT 3850802

Volvo Penta 3850802 is a genuine OEM plug used in select Volvo Penta inlet and exhaust system applications. Current parts references place this part directly in the DPX375-A inlet and exhaust system schematic, where it appears as plug object key 14 alongside the exhaust manifold, nipple, fitting, exhaust elbow, and related hose hardware. Another current parts source specifically identifies it as a brass pipe plug, 1/4 inch NPT, which gives this part a much clearer application profile than a generic plug listing.

Key Features

• Genuine Volvo Penta OEM part number 3850802.
• Identified in current Volvo Penta schematic references as Plug, schematic object key 14.
• Strongest application reference places it in DPX375-A / Inlet and Exhaust System.
• Current parts detail also identifies it as a brass pipe plug, 1/4 inch NPT.
• Dealer weight references place it at approximately 0.03 to 0.04 lb.

Engine Compatibility

The strongest supportable fitment for 3850802 is by DPX375-A inlet and exhaust assembly rather than by a broad engine-family claim. Current Volvo Penta schematic references place it in the exhaust-side parts diagram for that propulsion package, and broader catalog references describe it more generally as a Volvo/Volvo Penta engine plug. The safest fitment path is to match this plug to the exact Volvo Penta engine or drive schematic and serial-number-based application before ordering.

Serial Number Fitment Notice

Match Volvo Penta part number 3850802 to your engine or drive serial number and the correct Volvo Penta inlet, exhaust, or related system diagram before ordering. Small threaded plugs can vary by assembly version, port size, and production break, even when the surrounding manifold or pipe layout looks very similar.

When This Part Needs Replacement

This plug should be replaced when it is damaged, corroded, leaking, has worn threads, or is disturbed during exhaust or fluid-system service. It is also worth replacing when the surrounding manifold, fitting, or elbow assembly is already apart and the original plug shows sealing-surface wear.

Installation Notes

Confirm the exact application in the correct Volvo Penta schematic before installation, and compare the removed part carefully against the replacement plug. Verify the port size and thread specification before installation, especially because one current listing identifies this part as 1/4 inch NPT. Inspect the mating threads and nearby exhaust-side fittings before reassembly.

Alternate/Superseded Part Numbers

The reviewed sources continue to list 3850802 as a genuine Volvo Penta OEM number. Marine Parts Express also shows a related straight drain kit REC13980 on the product page, but that is a related aftermarket service item rather than a confirmed Volvo Penta supersession.

Parts Desk Insight

With small threaded plugs like this, the easy mistake is matching only by appearance. Checking the exact diagram location and thread spec first usually saves time, especially when exhaust-side plugs in nearby assemblies can look almost identical on the bench but use different thread sizes or sealing methods.

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