KPALAG Oil Pressure Sender Sensor — 1/8"-27 NPT Direct-Fit for Mercury/Mercruiser & Volvo Penta, 10-32 Terminal 0–80 psi

KPALAG oil pressure sender sensor delivers reliable oil-pressure readings for compatible Mercury/Mercruiser, Volvo Penta and OMC marine and automotive engines.

This KPALAG sensor is a direct-fit replacement sending unit designed to restore accurate oil pressure feedback to your instrument panel or engine control system. Built to match common OEM thread and electrical interfaces, it simplifies repair work on 4-cylinder, V6 and V8 engines from Mercury, Mercruiser, Volvo Penta and OMC, and replaces many factory part numbers so you can swap it in without custom adapters.

How does this sensor match my original equipment?

The KPALAG sender uses a standard 1/8"-27 NPT thread, a 10-32 stud terminal and provides a resistance output from 0 to 300 ohms that maps to oil pressure from 0 to 80 psi. It’s engineered to mirror the electrical and mechanical characteristics of the listed OEM parts so instrument clusters and ECU inputs receive the expected signal.

• Thread: 1/8"-27 NPT for direct replacement
• Terminal: 10-32 stud compatible with common connectors
• Output: 0–300 ohms corresponding to 0–80 psi range
• Fits sender holes on many Mercury, Mercruiser, Volvo Penta and OMC models

Which factory part numbers and engines does it replace?

This sender is cross-referenced to numerous OEM numbers, making it suitable where those originals were installed. It’s commonly used on small to large displacement marine engines and a variety of inboard/outboard powerplants.

• Replaces Mercury/Mercruiser: 815425T, 8M0068784, 34623, 815425, 87-815425T, 90806, 90806A1
• Replaces Volvo Penta & OMC: 3857532, 18-5899, 90806, 34623OMC, 3853800, 0982650 and others
• Compatible with 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.2L and similar 4L, V6, V8 engines

Will installing this sensor fix erratic gauge readings?

Yes — replacing a failed or degraded sender with a matching specification unit typically clears unstable or incorrect oil-pressure indications. Because this KPALAG part reproduces the resistance-to-pressure curve of the original, the gauge or ECU receives a consistent signal at idle and at higher RPMs.

• Plug-and-play fit reduces installation time and wiring changes
• Stabilizes gauge behavior at low engine speeds and idle
• Restores accurate pressure reporting to dash instruments or control modules

What should I check before buying and installing?

Confirm the thread, terminal type and required pressure range on your engine or existing sender to ensure interchangeability. Also verify one of the listed OEM part numbers or engine applications matches your vehicle or boat to avoid fitment issues.

• Verify your original part number against the cross-reference list
• Confirm 1/8"-27 NPT thread and 10-32 stud terminal compatibility
• Check that instrument or ECU expects a 0–300 ohm input for 0–80 psi

Who this is for: Technicians, boat owners and DIY mechanics who need a cost-effective, direct-replacement oil pressure sender for Mercury, Mercruiser, Volvo Penta or OMC engines. Ideal for anyone restoring correct oil-pressure signaling after a failed sender, troubleshooting inconsistent gauge readings, or replacing hard-to-source OEM parts with a matching-spec aftermarket unit.