MerCruiser
525 EFI (500-hp)

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525 EFI (500-hp)
This all-new sterndrive engine features custom Edelbrock aluminum cylinder heads, designed exclusively for Mercury Racing, closed cooling, new stainless steel CMI tubular “sweeper” headers and the exclusive Mercury Propulsion Control Module (PCM) 555. The results? Higher horsepower and a higher torque band throughout the engine operating rpm range.

Fast Facts
Propshaft HP	500-hp
Configuration	V8
Displacement	8.2/ 502
Bore & Stroke	4.47 x 4.00
Fuel System	MPI
Base Engine Weight	1201 lbs.
Length/Width/Height	39.5 x 34 x 24
Max RPM@WOT	5200
Warranty	1-year

Key Features

Precision CNC machined 502 C.I.D. cast iron cylinder block.
Advanced, factory installed closed-cooling system features five-year coolant for reduced maintenance and increased corrosion protection.
Custom electronic gauge interface module, designed by Mercury Racing, allows for operation of either analog or digital instrumentation.
Multiport fuel injection system incorporates a high-flow throttle body and flame arrestor developed exclusively by Mercury Racing.
Water-cooled fuel system works in concert with a low pressure and high pressure fuel pump to keep fuel temperatures at optimum levels while reducing t
A thermostatically controlled, high-capacity oil cooler raises engine oil temperatures faster and keeps them more consistent.
A hydraulic roller camshaft and an idle air valve, located at the rear of the intake plenum, work in concert to improve engine idle quality.
Custom Edelbrock aluminum cylinder heads, designed exclusively for Mercury Racing, enhance torque and overall performance.
Dual-water pickup and low-water pickup gearcase housings for Bravo One XZ and standard Bravo One XR drives.

Boats Tested with this Engine
Baja 35 Outlaw Poker Run Edition
Baja 40 Outlaw

MerCruiser 525 EFI (500-hp)
Propshaft HP	500-hp
Max RPM@WOT	5200
Dry Weight	1201 lbs.
Length/Width/Height(in)	39.5 x 34 x 24
Displacement (liters/cu.in)	8.2/ 502
Cylinders/Configuration	V8
Bore & Stroke	4.47 x 4.00
Alternator Output Rating	65 amp
Shaft Length	~
Fuel Type	Gasoline
Fuel System	MPI
Exhaust System	~
Ignition System	PCM 555 distributorless
Cooling System	Water-cooled
Electronic Engine Display	Yes


MerCruiser 525 EFI (500-hp)

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Key Features

MerCruiser 525 EFI (500-hp)