COVID-19 UPDATE: We are open for business! Walk-ins are not allowed but orders may be placed online and picked up at our warehouse. We are shipping orders as fast as we can with a limited staff. S ome shipments will be delayed regardless of status shown on the website. Mercury factory backorders are common right now and we have no guarantee of release dates. 4.3 MerCruiser Overheating (4.3L MPI Alpha and Bravo) 2001-2008 October 27, 2016 Repair Manual Do-It-Yourself MerCruiser Repair Guides 0 We often get the question, ‘why is my 4.3L MPI MerCruiser.
A line to repower sterndrive boats with value performance.
3.0 Alpha® TKS
135 Crankshaft Horsepower
The ideal repower for your runabout or pontoon boat using the classic front engine mount system. No Power Steering - The best value available with Turn Key Starting.
350 MPI Alpha
Mercury 4.3 Mpi Service Manual
300 Crankshaft Horsepower Thanks to its size and power, this is the ideal replacement engine for 5.0L, 5.7L, 5.0 MPI and 5.7 EFI engines that power cruisers, small boats and large runabouts.
4.3L Alpha 4V
225 Crankshaft Horsepower
WOW! A V-6 that makes more power than a 5.0L V-8. Replaces 4.3L- and 5.0L-powered runabouts while delivering V-6 fuel economy.
357 Alpha 4V
275 Crankshaft Horsepower
Don't just repower--power up! The world-famous 357 Alpha will breathe new life into your runabout, sport boat or pontoon boat when replacing a 4.3L, 5.0L, or 5.7L engine.
Owners Manuals
Need an Owner’s Manual for your Mercury engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to purchase a printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.
Specifications
Mercury® Remanufacturing: Plus-Series Alpha Sterndrives
PrintCompare With Other ProductsPart number - 863611R11
HP / kW @ flywheel - 300 / 224
Maximum RPM (WOT) - 4600 - 5000
Engine type - V-8 Remanufactured Iron Marine Block
Displacement (CID/L) - 355 / 5.8
Bore and stroke - 4.03 x 3.48' / 103 x 88 mm
Compression ratio - 9.4:1
Fuel ethanol tolerance - Up to 10%
Engine control system - ECM 555 W/Knock Control & Crankshaft Trigger
Fuel delivery system - GEN II Cool Fuel with Boost Pump
Fuel injection system / carburetor type - Multi-point electronic fuel injection (MPI)
Air induction - Two-piece long runner intake with 75 mm throttle body (80 mm w/DTS)
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - Multi-point drain
Exhaust system - Iron manifold with Dry-Joint Exhaust Elbow
Cooling system - 160F Raw Water Alpha
Accessory drive system - Serpentine belt
Lubrication system - High Flow 60 psi Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
Pistons - Cast Hypereutectic Alloy
Cranktrain - Powder Metal Rods and Nodular Iron Crankshaft
Rocker arms - 1.5:1 Stamped Steel
Dimensions (L x W x H) - 32 x 30 x 22' / 814 x 740 x 559 mm
Weight (engine only) - 932 lbs / 423 kg
Compatible drives (application dependent - contact sales or service) - Alpha 1.47:1
- Alpha 1.81:1
PrintCompare With Other ProductsPart number - 865108R88
HP / kW @ flywheel - 275 / 205
Maximum RPM (WOT) - 4400 - 4800
Engine type - V-8 Remanufactured Iron Marine Block
Displacement (CID/L) - 357 / 5.8
Bore and stroke - 4.04 x 3.48' / 103 x 88 mm
Compression ratio - 9.4:1
Fuel ethanol tolerance - Up to 10%
Engine control system - Thunderbolt V w/Knock Control
Fuel delivery system - 4V carburetor and electric fuel pump
Fuel injection system / carburetor type - 750 cfm Weber 4V with electric choke
Air induction - Dual plane aluminum intake manifold with brass water crossover
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - Multi-point drain
Exhaust system - Electro-deposition paint coated warm iron manifold with wet joint elbow
Cooling system - 160F Raw Water
Accessory drive system - Serpentine belt
Lubrication system - High Flow 60 psi Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
Pistons - Cast Hypereutectic Alloy
Cranktrain - Powder Metal Rods and Nodular Iron Crankshaft
Rocker arms - 1.5:1 Stamped Steel
Dimensions (L x W x H) - 32 x 30 x 22' / 814 x 740 x 559 mm
Weight (engine only) - 871 lbs / 395 kg
Compatible drives (application dependent - contact sales or service) - Alpha 1.47:1
- Alpha 1.81:1
PrintCompare With Other ProductsPart number - 865108R89
HP / kW @ flywheel - 225 / 168
Maximum RPM (WOT) - 4400 - 4800
Engine type - V-6 Remanufactured Iron Marine Block
Displacement (CID/L) - 265 / 4.3
Bore and stroke - 4.03 x 3.48' / 102 x 88 mm
Compression ratio - 9.4:1
Fuel ethanol tolerance - Up to 10%
Engine control system - Thunderbolt V
Fuel delivery system - 4V carburetor and electric fuel pump
Fuel injection system / carburetor type - 600 cfm Weber 4V with electric choke
Air induction - Dual plane iron intake manifold
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - Multi-point drain
Exhaust system - Electro-deposition paint coated warm iron manifold with wet joint elbow
Cooling system - 160F Raw Water
Accessory drive system - Serpentine belt
Lubrication system - High Flow 60 psi Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
Pistons - Cast Hypereutectic Alloy
Cranktrain - Powder Metal Rods and Nodular Iron Crankshaft
Rocker arms - 1.5:1 Full Roller Steel
Dimensions (L x W x H) - 28 x 30 x 22' / 696 x 740 x 559 mm
Weight (engine only) - 784 lbs / 356 kg
Compatible drives (application dependent - contact sales or service) - Alpha 1.47:1
- Alpha 1.62:1
- Alpha 1.81:1
PrintCompare With Other ProductsPart number - 8M0072497
HP / kW @ flywheel - 135 / 99
Maximum RPM (WOT) - 4400 - 4800
Engine type - Remanufactured 3.0L GM Inline-4 Marine Iron Block & Heads
Displacement (CID/L) - 184 / 3.0
Bore and stroke - 4.03 x 3.60' / 102 x 91 mm
Compression ratio - 9.3:1
Fuel ethanol tolerance - Up to 10%
Engine control system - Distributor
Fuel delivery system - 2V Merc Carb with Automatic Enrichment for Turn Key Starting with Mechanical Fuel Pump
Air induction - Iron Manifold
Alternator amp / Watt - 65 amp / 917 watt
Water drain system - EZ Water Drain
Exhaust system - Iron manifolds with electro-deposition paint coated dry joint exhaust elbow
Cooling system - 160F Raw Water
Accessory drive system - V-Belt
Lubrication system - High Flow Oil Pump
Recommended oil - Mercury MerCruiser Synthetic Blend 25W-40, NMMA FC-W rated
Cranktrain - Nodular Iron Crankshaft
Rocker arms - 1.5:1 Stamped Steel
Dimensions (L x W x H) - 29 x 22 x 21' / 730 x 565 x 526 mm
Weight (engine only) - 567 lbs / 257 kg
You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.
- Operation, Maintenance, and Warranty Manuals
- Parts Manual
- Service Manual
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See for yourself what makes us the best on the water
Customers are confident when they buy Mercury®. An investment in unmatched quality, durability, and performance. Browse our engine test data to check out the numbers behind the name.
See performance testsCustomers are confident when they buy Mercury®. An investment in unmatched quality, durability, and performance. Browse our engine test data to check out the numbers behind the name.
Frequently Asked Questions on products, warranty, storage and maintenance.
See all FAQsMercury Joystick Piloting - the system that allows you to effortlessly move your Mercury-powered boat in any direction with the push of a joystick. It takes the stress out of docking and maneuvering in tight spaces and less-than-ideal environments. Check out these how-to videos to learn more about this awesome technology.
Watch these step-by-step maintenance videos created to help you care for your Mercury engine.
A Material Safety Data Sheet (MSDS) is a form containing data regarding the properties of a particular substance. It is intended to provide workers and emergency personnel with procedures for handling or working with that substance in a safe manner.
Download MSDS sheetsNeed an Owner’s Manual for your Mercury Engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to receive a free printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.
Download HereMercruiser 4.3 Mpi Maintenance
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Mercruiser 4.3mpi Manual
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