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Mercury Mercruiser engines

502 Magnum MPI

The 415 hp 502 MAG MPI shares all the performance attributes of the small block 350 MAG MPI and big block 454 MAG MPI. All MAG MPI Series engines feature a high-tech, water-cooled fuel system to maintain consistent fuel delivery under all operating conditions. A one-piece serpentine belt system drives the power steering pump. This design is easier to service, requires less maintenance, provides unsurpassed belt life, and requires less horsepower to drive the engine accessories. The high-output 65-amp alternator gives you consistent turn-key starting and extra power to handle the demands of today's state-of-the-art electronics.

Mercury mercruiser marine engine

Features:

An advanced roller cam design provides a lower friction coefficient, added torque, improved fuel economy, and greater horsepower for improved acceleration and top speed. Bravo One Performance drive available The new MEFI 3 ECM features advanced electronics for more precise fuel and spark control along with better top-end throttle response. Powerful 65-amp/917 watt alternator easily compensates for extra power required by EFI systems and fully charges batteries for dependable starting and powering of additional electrical accessories. EDP coated cast iron exhaust elbows for excellent corrosion resistance. Steel cone clutch provides smooth, quiet shifting operation. Lab finished Mercury Racing Mirage-Plus and Bravo 1 propellers available. Water-cooled and insulated fuel system helps keep fuel temperatures down.

502 MAG MPI Specifications

Propshaft Horsepower: 415 (309 kw)
Displacement (Liter/CID): 8.2/502
Cylinders: V-8
Bore (in/mm): 4.47/114
Stroke (in/mm): 4.00/102
Compression Ratio: 8.75:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4600-5000
Ignition Type: Digital
Alternator: 65/917
Length (in/cm): 39/991
Width (in/cm): 32 in. /813
Height (in/cm): 22/559
Weight (lbs/kg): 1189/539 (Weight with Bravo One Drive)
Warranty: 1-year limited, 3-year limited corrosion

 

454 Magnum MPI

MerCruiser's 454 MAG MPI cranks out a potent 385 propshaft horsepower. Technicians enhance the performance of the stock 454 GM block by using high flow cylinder heads with enlarged intake ports that improve air flow throughout the engine. Hardened exhaust valve seat inserts are more tolerant of low lead fuels, improving reliability and engine life. For maximum reliability and strength in high demand situations, we use a forged steel crankshaft, connecting rods, and forged alloy pistons. A technologically advanced roller cam design improves low-end torque, offers higher levels of performance, and aids fuel economy. This, in addition to MerCruiser's exclusive Cross-Ram fuel injection system, results in added torque, improved acceleration, and increase top-end speed. Everything you expect from MerCruiser.

Mercury mercruiser marine engine

Features:

An advanced roller cam design provides a lower friction coefficient, added torque, improved fuel economy, and greater horsepower for improved acceleration and top speed. Bravo One Performance drive available The new MEFI 3 ECM features advanced electronics for more precise fuel and spark control along with better top-end throttle response. Powerful 65-amp/917 watt alternator easily compensates for extra power required by EFI systems and fully charges batteries for dependable starting and powering of additional electrical accessories. EDP coated cast iron exhaust elbows for excellent corrosion resistance. Steel cone clutch provides smooth, quiet shifting operation. Lab finished Mercury Racing Mirage-Plus and Bravo 1 propellers available. Water-cooled and insulated fuel system helps keep fuel temperatures down.

454 MAG MPI Specifications


Propshaft Horsepower: 385 (287 kw)
Displacement (Liter/CID): 7.4/454
Cylinders: V-8
Bore (in/mm): 4.25/108
Stroke (in/mm): 4.00/102
Compression Ratio: 8.6:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4600-5000
Ignition Type: Digital
Alternator: 65/917
Length (in/cm): 39/991
Width (in/cm): 32/813
Height (in/cm): 22/559
Weight (lbs/kg): 1177/534 (Weight with Bravo One Drive)
Warranty: 1-year limited, 3-year limited corrosion

 

350 Magnum MPI

This versatile 300hp small block, with a wide variety of sterndrive options, is a top performer at cruising speeds and wide open throttle. The 350 MAG MPI small block V-8 includes multiport fuel injection system that inspires turn-key starts, optimized fuel/air distribution to each cylinder, and unmatched idle speed control. An oversized 90mm throttle body increases air flow for added muscle on the high end and improved overall power. The MEFI 3 Electronic Control Unit features advanced electronics for more precise fuel and spark control, along with improved top-end throttle response.

Mercury mercruiser marine engine

Features:

An advanced roller cam design provides a lower friction coefficient, added torque, improved fuel economy, and greater horsepower for improved acceleration and top speed. Bravo One Performance drive available The new MEFI 3 ECM features advanced electronics for more precise fuel and spark control along with better top-end throttle response. Powerful 65-amp/917 watt alternator easily compensates for extra power required by EFI systems and fully charges batteries for dependable starting and powering of additional electrical accessories. EDP coated cast iron exhaust elbows for excellent corrosion resistance. Steel cone clutch provides smooth, quiet shifting operation. Lab finished Mercury Racing Mirage-Plus and Bravo 1 propellers available. Water-cooled and insulated fuel system helps keep fuel temperatures down.

350 MAG MPI Specifications


Propshaft Horsepower: 300 (224 kw)
Displacement (Liter/CID): 5.7/350
Cylinders: V-8
Bore (in/mm): 4.00/102
Stroke (in/mm): 3.48/88
Compression Ratio: 9.4:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4600-5000
Ignition Type: Digital
Alternator: 65/917
Length (in/cm): 37/940
Weight (lbs/kg): 29/737
Height (in/cm): 22/559
Weight (lbs/kg): 1025/465 (Weight with Bravo One Drive)
Warranty: 1-year limited, 3-year limited corrosion

Visit our other Mercury Marine Equipment


350 454 502

HP500 HP 525

HP600 to HP900

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Bullock Marine offers new & used powerboats as well as performance boat accessories: skater, fountain, eliminator, Mercruiser Mercury Marine (competition - racers & performance propellers, Zero Effort Controls™, K-Plane™ high performance trim tabs, Mercury Racing Trim Indicators™, high performance engines, competition drive, etc.) cigarette boat, welcraft, scarab, donzi boats, catamaran raceboat, high speed twin hull, etc. Bullock Marine is an authorized dealer for Douglas Marine Skater Powerboat, Regy Fountain powerboat & sport boat, Eliminator powerboat & sport boat, and Mercury Mercruiser marine engines, Drive & accessories.

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