Mercury 300 HP SEAPRO CSM V8


Mercury 300 HP SEAPRO CSM V8

Mercury 300 HP SEAPRO V8 CMS, 4-Stroke, Short Shaft/Long Shaft.

Price POA

The all-new SeaPro V-8 Mercury FourStroke outboards bring more of everything to the job MORE DISPLACEMENT, MORE POWER, MORE EFFICIENCY and MORE DURABILITY.

  • Engineered for maximum Durability and Reliability
  • High-displacement V-8 4.6L a powerhead delivers loads of torque at a lower rpm with less stress on the engine
  • Exceptionally lightweight design and Advanced Range Optimization maximize Fuel Economy at cruise
  • Easy and Intuitive to Maintain
  • Industry-exclusive battery-management technology with ample charging output.

Guaranteed to do its job, so you can do Yours.

HP/kW @ Prop
Cylinders / Configuration
V8 [64 degree] with 32-valve Dual Overhead Cam [DOHC]
Displacement (CID/Liters)
Bore x Stroke (mm/in)
3.6 x 3.4 / 92 x 86
Induction System
Performance-Tuned Long-Runner Intake Manifold
SmartCraft PCM 112 Digital Inductive
Fuel System
Electronic Fuel Injection [EFI] with ARO
Alternator Amp/Watt
85 amp / 1071 watt belt-driven [Idle Charge]
Midsection Design
Centralized Motor Mounts
SmartCraft Electric [turn-key] with SmartStart Protection
Gearcase / Ratio
544″ 1.75:1 [RH/LH]
Gear Shift
Electronically-Actuated Shifting
Mechanical Control with Digital Throttle and Shift [DTS]
Hydraulic [Optional] Power Steering Kit [Optional] Bit Tiller Handle Kit [Optional]
Mounting Centers
Minimum 26-inch (660 mm) Centers
Engine Protection System
SmartCraft Engine Guardian
Recommended Oil
NMMA Certified FCW SAE 25W-40
Oil Capacity
7.0 qts / 6.6 L
Fuel Requirements
Unleaded Regular 87 Octane Minimum [R+M/2] Or 91 RON 10% Ethanol Maximum
Dry Weight (lbs/kg)
527/239 *lightest model available.
Trim Range
20 degree (-6 to 14 degrees)
Tilt Range
73 degree (-6 to 67 degrees)
Shaft Length inches (mm)
20 (508) 25 (635) 30 (762)
Operator Warning System
SmartCraft Engine Guardian
Phantom Black