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Description
Specs
Standard Features

Description

Mercury Racing is all about passion for perfection and the pursuit of peak performance. We have a reputation of exceeding consumer expectations in product quality and performance - something we've carried forward from the late Carl Kiekhaefer, Mercury Racing president Fred Kiekhaefer's father and founder of Mercury Marine. The all-new OptiMax 300XS outboard continues our heritage of delivering more power and performance than competitors with the same horsepower rating.

The heart of the new 300XS "Stroker" is a 3.2 Liter V-6 powerhead featuring a stroked and precision-balanced crankshaft for maximum power and performance. A dampener ensures smooth running throughout the engine operating range. New pistons feature an updated profile and a composite coating for improved wear life. Piston ring life is doubled thanks to a composite chrome coating.

The exhaust port, combustion chamber and fuel induction designs are direct descendants from our Formula 1 tunnel boat race engine. Airflow through the reed block fuel induction system is enhanced due to an enhanced air box design along with thinner reed material and the unique reed shape developed for Formula 1 racing.

As with the complete line of Mercury Racing OptiMax XS outboards, the 300XS comes with a heavy-duty direct fuel injection air compressor featuring robust maxi-coated mounting brackets and hardware for enhanced compressor durability and reliability.

Specs

Manufacturer
Mercury
Model Year
2008
Model
OptiMax 300 XS
MSRP
Request a Quote

Engine

Engine Type
V-6 (60 vee)
Horsepower
300 hp (224 kW)
Displacement
193 ci (3,160 cc)
Bore x Stroke
3.63 x 3.11 in. (92 x 79 mm)
RPM
5,400 - 5,800
Fuel Induction
2-stage direct fuel injection
Lubrication
Electronic multi-point oil injection
Ignition
PCM 07
Starting
Electric (turn-key)

Drivetrain

Gear Ratio
1.62:1, 1.75:1 (SM), (TM) or 1.75:1 (FM)

Electrical

Alternator
60A
Alternator Output
756W

Measurements

Shaft Length
20 in. (508 mm) / 25 in. (635 mm) / 30 in. (762 mm)
Weight
(L) 505 lbs. (229 kg) / (XL) 517 lbs.(235 kg) / (XXL) 534 lbs. (242 kg)

Operational

Steering
Right or left hand (FM), (SM) Right hand (TM)

Standard Features

 3.2 Liter V-6 powerhead features stroked & balanced crankshaft for maximum displacement & performance  
 Extensive R&D result in Formula 1 race based exhaust porting & reed block fuel induction design for top power  
 New combustion chamber design results in engine producing peak power longer at upper end of operating rpm range  
 A unique 2-stage direct-injection system atomizes fuel into small, uniform particles, resulting with a complete & instantaneous combustion  
 FueVair mixture is injected into the combustion chamber at 95 psi (15 psi higher fueVair differential than standard DFI or OptiMax product) for enhanced high rpm running quality  
 New PCM 07 microprocessor features a 14-pin Deutsch connector harness which incorporates engine ignition & SmartCraft CAN (controller area network) wiring in one connector  
 The SmartCraft Engine Guardian system monitors engine functions for early indications of problems that could lead to engine damage  
 The 60-amp, belt-driven alternator is the most powerful in its class  
 Electronic multipoint lubrication system delivers precise amounts of oil where & when its needed  
 Acoustically tuned foam cowling wrap & new exhaust bucket design results with quieter engine sound throughout the operating range  
 Through hull Noise Vibration Harshness (NVH) is further reduced on 25 in. and 30 in. models thanks to the use of softer upper & lower engine mounts  
 A new exhaust system, along with a foam lined cowl & attenuator for the compressor greatly reduces the operating Dba.  
 Torque Master, Sport Master & new Heavy-Duty Fleet Master gearcases are enhancing the versatility of the worlds most powerful available for virtually any application  
 Suitable for:
  • Bass boats
  • Bay boats
  • Catamaran sports boats
  • Flats boats
  • Offshore center consoles
  • River racers
  • Vee bottom sport boats
  • Walleye boats
  •  
    *Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer vehicle freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.

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