KPALAG Oil Pressure Shutoff Sensor Switch for Mercruiser V8 4.3L–8.2L — Stainless Steel Direct Replacement

KPALAG oil pressure fuel pump pressure shut sensor switch is a direct-replacement sensor for Mercruiser V8 engines that monitors oil pressure and signals the fuel pump cutoff to prevent the oil-pressure warning light from staying on.

This replacement pressure shutoff sensor is designed to match Mercruiser (Quicksilver) 4.3L, 5.0L, 5.7L (305/454), 7.4L, 8.2L, and 502 V8 engine models. Built from flame-retardant PA plastic and stainless steel, it aims to deliver consistent readings, longer life and responsive performance. It replaces part numbers 87-864252A01, 87-805024, 87-8M0070108 and 87-864252 and is intended as a straightforward swap for technicians and boat owners who need a reliable oil pressure shut sensor without extensive modification.

How does this sensor stop the oil pressure light from staying on?

The switch detects the engine's oil pressure and opens or closes the circuit that controls the fuel pump or warning indicator. When pressure is within the correct range the sensor allows normal operation; if pressure drops or the switch fails closed, it signals the system to cut fuel or trigger the warning. It restores proper sensor feedback so the dash indicator reflects real conditions.

• Directly replaces original Mercruiser part numbers for fit and function
• Responsive actuation to reflect pressure changes quickly
• Prevents false-positive oil pressure warnings when functioning correctly

Will this part fit my Mercruiser 5.7L or 8.2L engine?

Yes — the KPALAG sensor is compatible with a broad range of Mercruiser V8 engines including 4.3L, 5.0L, 5.7L (305/454), 7.4L, 8.2L and 502 configurations. Check that your OEM or current sensor part number matches one of the replacements listed. Confirm thread type and connector style against your engine's existing sensor before installation.

• Replaces 87-864252A01, 87-805024, 87-8M0070108, 87-864252
• Designed for common Mercruiser V8 models and typical mounting points
• Compare electrical connector and thread size to ensure compatibility

How durable and accurate is the KPALAG pressure shut sensor?

The unit uses flame-retardant PA plastic and stainless-steel components to resist corrosion and heat commonly found in marine engine compartments. That construction supports stable output and longer service life compared with lower-grade replacements. While no sensor lasts forever, its materials and assembly prioritize consistent response and accuracy for routine marine use.

• Flame-retardant PA housing for heat resistance
• Stainless-steel internals to reduce corrosion in marine environments
• Engineered for stable electrical response and repeatable actuation

How easy is installation and what tools are needed?

Installation is intended to be simple: this is a direct replacement designed to use the existing sensor port and electrical connector. Basic hand tools are usually sufficient, and most marine technicians or experienced DIYers can complete the swap quickly. No special programming or calibration is typically required.

• Direct-fit replacement reduces modification or adapter needs
• Standard wrenches and electrical disconnect tools recommended
• Typically no onboard computer reprogramming necessary

Who is this for: Boat owners, marine mechanics and fleet operators running Mercruiser V8 engines who need a reliable replacement oil pressure fuel pump shut sensor. It’s suited to anyone seeking a cost-effective OEM-compatible part to restore correct oil pressure signalling and prevent persistent dash warnings, while avoiding complex installation or engine changes.