20 Best Mercruiser 4.3 Low Oil Pressure [2024]

Are you looking for the best Mercruiser 4.3 Low Oil Pressure? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Mercruiser 4.3 Low Oil Pressure.

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# Preview Product
1 BB Mercruiser Low Oil Pressure Switch, Replaces 87-805605A1 BB Mercruiser Low Oil Pressure Switch, Replaces 87-805605A1
2 Low Oil Pressure Fuel Pump Shut Off Sensor Switch Replaces Mercruiser 87-864252A01 87-805024... Low Oil Pressure Fuel Pump Shut Off Sensor Switch Replaces Mercruiser 87-864252A01 87-805024...
3 PLLP Oil Pressure Switch Sender Replaces MerCruiser 87-805605A1 OP22900 97767 457045 PLLP Oil Pressure Switch Sender Replaces MerCruiser 87-805605A1 OP22900 97767 457045
4 UANOFCN Replace Mercruiser 87-864252A01 87-805024 87-8M0070108 87-864252 Low Oil Pressure Fuel Pump... UANOFCN Replace Mercruiser 87-864252A01 87-805024 87-8M0070108 87-864252 Low Oil Pressure Fuel...
5 Oil Pressure Sender Sensor Replace 815425T 3857532 18-5899 8M0068784 Compatible with Volvo Penta... Oil Pressure Sender Sensor Replace 815425T 3857532 18-5899 8M0068784 Compatible with Volvo Penta...
6 Motorcraft SW8368 Oil Pressure Switch Motorcraft SW8368 Oil Pressure Switch
7 Dorman 926-041 Engine Oil Pressure Sensor Compatible with Select Models Dorman 926-041 Engine Oil Pressure Sensor Compatible with Select Models
8 ACDelco Professional C8020 Oil Pressure Switch ACDelco Professional C8020 Oil Pressure Switch
9 Royalo Oil Pressure Gauge Adapter Compatible with GM Gen III V8 Engine Silver Royalo Oil Pressure Gauge Adapter Compatible with GM Gen III V8 Engine Silver
10 Quicksilver 866340Q03 Oil Filter - MerCruiser Stern Drive and Inboard Engines Quicksilver 866340Q03 Oil Filter - MerCruiser Stern Drive and Inboard Engines
11 Quicksilver 802893Q01 Water Separating Fuel Filter - Mercury and Mariner Outboards and MerCruiser... Quicksilver 802893Q01 Water Separating Fuel Filter - Mercury and Mariner Outboards and MerCruiser...
12 Generac 0C3025 Generator Oil Pressure Switch Generac 0C3025 Generator Oil Pressure Switch
13 ACDelco GM Original Equipment 12677836 Engine Oil Pressure Sensor ACDelco GM Original Equipment 12677836 Engine Oil Pressure Sensor
14 Quicksilver 883702Q Engine Block Mount Oil Filter - V-6 MerCruiser Stern Drive Engines Quicksilver 883702Q Engine Block Mount Oil Filter - V-6 MerCruiser Stern Drive Engines
15 Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser... Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser...
16 ACDelco GM Original Equipment 12673134 Engine Oil Pressure Sensor ACDelco GM Original Equipment 12673134 Engine Oil Pressure Sensor
17 Generac - SWITCH OIL PRESSURE 8PSI 1POLE - 99236 Generac - SWITCH OIL PRESSURE 8PSI 1POLE - 99236
18 Larlansz 1/8' NPT Oil Pressure Sensor Tee to NPT Adapter Turbo Supply Feed Line Gauge Stainless... Larlansz 1/8" NPT Oil Pressure Sensor Tee to NPT Adapter Turbo Supply Feed Line Gauge Stainless...
19 GHHG Manual Drain Water Distribution Housing Assy 863631T1 863802T2 863444T2 Replaces Mercury... GHHG Manual Drain Water Distribution Housing Assy 863631T1 863802T2 863444T2 Replaces Mercury...
20 ACDelco GM Original Equipment D1834A Engine Oil Pressure Switch ACDelco GM Original Equipment D1834A Engine Oil Pressure Switch
Bestseller No. 1
BB Mercruiser Low Oil Pressure Switch, Replaces 87-805605A1
  • New engine low oil pressure switch used on many Mercruiser engines
  • Replaces Mercruiser 87-805605A1
  • Switch is set at 15 PSI
  • Also fits many other marine engine manufactures
Bestseller No. 2
Low Oil Pressure Fuel Pump Shut Off Sensor Switch Replaces Mercruiser 87-864252A01 87-805024...
  • Used on many Mercruiser engines
  • Fits 4.3, 5.0, 5.7, 305, 454, 7.4, 8.2, 502, v6, v8
  • Interchangeable with Mercruiser 87-864252A01 87-805024 87-8M0070108 87-864252
  • Easy installation
  • Package weight: 60g
Bestseller No. 3
PLLP Oil Pressure Switch Sender Replaces MerCruiser 87-805605A1 OP22900 97767 457045
  • Replaces MerCruiser 87-805605A1, OP22900, 97767, 457045,779-100
  • Applications : for Penta Marine Sierra Stewart Warner
  • Package Includes: 1x Oil Pressure Sender
  • This part meets OEM specifications
  • Ship from USA
Bestseller No. 4
UANOFCN Replace Mercruiser 87-864252A01 87-805024 87-8M0070108 87-864252 Low Oil Pressure Fuel Pump...
  • Replacement for Mercruiser 87-864252A01 87-805024 87-8M0070108 87-864252
  • Designed for many Mercruiser engines
  • Compatible with 4.3, 5.0, 5.7, 305, 454, 7.4, 8.2, 502, v6, v8
  • Stable characteristic and high reliability
  • Ship from USA
Bestseller No. 5
Oil Pressure Sender Sensor Replace 815425T 3857532 18-5899 8M0068784 Compatible with Volvo Penta...
  • New oil pressure sending unit for guage
  • For Mercruiser 4, V6 and V8 applications OMC, Crusader, Pleasurecraft and Volvo applications, Crusader - 700425, Mercruiser - 815425T, OMC - 982650,...
  • Replaces:Mercury / Mercruiser 815425T, 8M0068784, OMC / Volvo Penta 3857532, 18-5899, 90806, 34623OMC , 3853800, 0982650, 0172127
  • Thread Size: 1/8"-27 NPT, Range: 80 psi, Resistance:0-300ohms,Terminal Type: 10-32 Stud
  • Aftermarket Marine Oil Pressure Sender
SaleBestseller No. 6
Motorcraft SW8368 Oil Pressure Switch
  • Resists abrasion and corrosion
  • Made of high quality
  • Highly durable and reliable
  • Easy installation
  • Manufactured under stringent standards
SaleBestseller No. 7
Dorman 926-041 Engine Oil Pressure Sensor Compatible with Select Models
  • Ideal replacement - this oil pressure sensor directly replaces the original sensor on specified vehicles and applications
  • Durable construction - this sensor is specifically designed to withstand pressure and temperature extremes for reliable performance and accurate...
  • Cost-effective solution - offers original equipment fit and function at a competitive price
  • Trustworthy quality - backed by a team of designers and engineers in the United States
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleBestseller No. 8
ACDelco Professional C8020 Oil Pressure Switch
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function
Bestseller No. 9
Royalo Oil Pressure Gauge Adapter Compatible with GM Gen III V8 Engine Silver
  • Compatible with GM 4.8L, 5.3L, 5.7L, 6.0L engines, 1996-2006
  • Oil Pressure Adapter for engine oil pressure to be measured, replace for J-42907 and OTC 7219
  • Provids ports to attach oil pressure tester
  • Dual port for bottom or side tester connection
  • Installs in place of oil filter with 11/16" (17mm) hex drive socket
Bestseller No. 10
Quicksilver 866340Q03 Oil Filter - MerCruiser Stern Drive and Inboard Engines
  • Superior M-Pleated cleansing filter media removes oil contaminants that could damage your engine
  • Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your MerCruiser engine
  • Features an anti-drain back valve to ensure start up lubrication and eliminate dry starts
  • 50% thicker metal shell than conventional filters with a durable, corrosion resistant finish
  • For MerCruiser High Performance stern drive or Inboard engines made by General Motors and Mercury Marine
Bestseller No. 11
Quicksilver 802893Q01 Water Separating Fuel Filter - Mercury and Mariner Outboards and MerCruiser...
  • 25 micron filtering elements remove damaging or performance robbing fuel born contaminants
SaleBestseller No. 12
Generac 0C3025 Generator Oil Pressure Switch
  • Genuine OEM Generac Part
  • Designed For Various Generac GT990 And GT760 V-Twin Air Colled Engines, 00046732 Air-Cooled Automatic Standby Generator, 0044510 Generac Guardian,
  • Structured To Fit Centurion, Watchdog, Bryant, Carrier, Honeywell And Siemens Models
  • Constructed From A Sturdy Spring, High-Grade Seal Ring, And Tough Prime Materials For Enhanced Durability And Superior Reliability
  • PLEASE NOTE: Check your owner's manual to be sure 0C3025 is the correct replacement part for your model.
Bestseller No. 13
ACDelco GM Original Equipment 12677836 Engine Oil Pressure Sensor
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle.
  • GM regularly updates production and service part designs to integrate new materials and technologies.
Bestseller No. 14
Quicksilver 883702Q Engine Block Mount Oil Filter - V-6 MerCruiser Stern Drive Engines
  • Superior M-Pleated cleansing filter media removes oil contaminants
  • Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your MerCruiser engine
  • Features an anti-drain back valve to ensure start up lubrication and eliminate dry starts
  • 50% thicker metal shell than conventional filters with a durable, corrosion resistant finish
  • For V-6 MerCruiser stern drive engines where the filter is mounted on the engine block
Bestseller No. 15
Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser...
  • Lower unit gear oil formulated to protect against corrosion and excessive wear
  • Designed for outboard motor lower unit and sterndrive applications above 75 HP
  • Extreme pressure synthetic additives protect gears from metal to metal contact
  • Extends gear life in extreme conditions including high-speed and high-horspower applications
  • SAE 90 viscosity
Bestseller No. 16
ACDelco GM Original Equipment 12673134 Engine Oil Pressure Sensor
  • GM recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function
Bestseller No. 18
Larlansz 1/8" NPT Oil Pressure Sensor Tee to NPT Adapter Turbo Supply Feed Line Gauge Stainless...
  • Material: 304 Stainless Steel; Highly resistant to corrosion.
  • Inlet Thread Size: 1/8" NPT Male; Outlet Thread Size: 1/8" NPT Female;
  • Center Tap Thread Size: 1/8" NPT Outlet Female.
  • Overall Length: 2.0"; Body Length 1.5".
  • Easy Installation of Oil Pressure and/or Oil Temperature Sensors.Professional Installation is Highly Recommended.
Bestseller No. 19
GHHG Manual Drain Water Distribution Housing Assy 863631T1 863802T2 863444T2 Replaces Mercury...
  • Replaces Part #: Mercury MerCruiser 863631T1 863802T2 863444T2
  • Fits the following engine models: 4.3 5.0 5.7 6.2L
  • Also fits 262 305 350 377 CID
  • Type:Water Distribution Housing
  • Package Includes : 1 Water Distribution Housing 2 Manifold Engine Block Drain Plug
Bestseller No. 20
ACDelco GM Original Equipment D1834A Engine Oil Pressure Switch
  • Work with vehicle electronics to help optimize vehicle capabilities
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function

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  4. Product Value: This simply is how much bang for the buck you get from your Mercruiser 4.3 Low Oil Pressure.
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  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Mercruiser 4.3 Low Oil Pressure.
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FAQ:

Q: Is it normal to have oil pressure of 80 while running?

A: Is it normal to have oil pressure readings of 80 while running at or near WOT (4K +)? Midrange cruising speeds reads 60ish. Engine runs smooth, temp reading is 170-175ish, which imo normal. Oil dipstick is within the OK range. That seems a little high. I think you try to put a calibrated gauge on the engine and see what it really is.

Q: Can water in the oil cause high oil pressure?

A: High oil pressure can be indicative of water in the oil as well. It won’t show on the dipstick though… That seems a little high. I think you try to put a calibrated gauge on the engine and see what it really is. High oil pressure can be indicative of water in the oil as well. It won’t show on the dipstick though… Click to expand…

Q: What does high oil pressure indicate?

A: High oil pressure can be indicative of water in the oil as well. It won’t show on the dipstick though… Click to expand… Volphin….last fall I did the oil change b 4 storage.