DF300BMD 300HP

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SKU: WEBDF300BMD Category:
Suzuki Repower by Mastry Engine Center

Integrated Steering Meets Dual Prop Power at 300 HP

The Suzuki DF300BMD is a 4390 cc V6 four-stroke outboard rated at 300 hp across a 5300-6300 rpm full-throttle operating range, the Integrated Steering trim of Suzuki’s Dual Prop line at 300 hp. Suzuki builds it around the Suzuki Dual Propeller System, Suzuki Precision Control, Suzuki’s first Integrated Steering System, a redesigned gear case, a Dual Injector fuel system and Variable Valve Timing.

Powerful and efficient. The DF300BMD is built around the same 4390 cc 55-degree V6 DOHC 24-valve powerhead and contra-rotating Suzuki Dual Propeller System as the DF300B, and adds Suzuki’s first Integrated Steering System — a hydraulic steering actuator built into the outboard itself, with no external steering cylinder to interfere with the transom or catch on the way up when the motor tilts. The redesigned gear case that comes with it improves gear oil circulation, cuts fluid capacity from 3.2 L to 2.8 L, reduces frontal area by about 4%, and adds a service passage that does not require lifting the boat.

Easy to live with. Suzuki Precision Control is a computer-based drive-by-wire throttle and shift system that eliminates the friction and resistance of mechanical control cables, for smooth, crisp shifting that is most noticeable at low rpm while docking and maneuvering. A Dual Injector fuel system atomizes fuel more finely and cools the combustion chamber to suppress knock, and Variable Valve Timing adds low- and mid-range torque without giving up top end. A knock sensor feeds the ECM real-time combustion data to manage timing precisely.

Built for saltwater. Suzuki’s Anti-Corrosion System applies a multi-layer finish — an epoxy primer, an acrylic basecoat and a clear topcoat — bonded directly to the outboard’s aluminum surface for protection in fresh and saltwater alike. The DF300BMD is offered in Pearl Nebular Black or White.

  • Suzuki’s first Integrated Steering System: hydraulic steering built into the outboard, no external cylinder
  • Redesigned gear case: improved oil circulation, reduced fluid capacity, serviceable without lifting the boat
  • Suzuki Dual Propeller System: contra-rotating propellers on a smaller, more hydrodynamic gear case
  • Suzuki Precision Control electronic throttle and shift standard
  • Dual Injector fuel system and Variable Valve Timing for added low- and mid-range torque
  • 2-Stage Gear Reduction, 2.29:1 gear ratio
  • Electric start (Suzuki Start System) and power trim and tilt standard, 761 lb dry weight

Rigging. The DF300BMD is rigged to order, Suzuki Precision Control only, in Pearl Nebular Black or White, with a 20 in, 25 in or 30 in transom. Every DF300BMD has electric start, power trim and tilt and the Integrated Steering System as standard. Contact your Mastry dealer for the right rigging for your transom.

Spec sheets

Brochures

Specification Value
Maximum output 300 hp
Full-throttle operating range 5300-6300 rpm
Configuration V6, 4-stroke, DOHC 24-valve (55-degree bank angle)
Valve train drive Chain, with Variable Valve Timing
Displacement 267.9 cu. in / 4390 cc
Bore x stroke 3.74 in x 3.82 in / 98 mm x 97 mm
Fuel system Multi-point sequential electronic fuel dual injection with Lean Burn Control and oxygen sensor feedback
Recommended fuel 87 octane
Ignition system Solid state direct ignition
Starting system Electric (Suzuki Start System)
Alternator 12 V, 54 A
Oil pan capacity 8.5 qt / 8.0 L
Dry weight 761 lb (20 in shaft), 776 lb (25 in shaft) or 794 lb (30 in shaft)
Recommended transom height 20 in, 25 in or 30 in
Engine mounting Shear mount
Trim method Power trim and tilt
Gear ratio 2.29:1
Gear shift F-N-R (drive-by-wire)
Exhaust Through prop hub
Propeller selection 12 in to 31.5 in pitch, contra-rotating
Steering and controls Suzuki Precision Control electronic throttle and shift standard, with Suzuki’s Integrated Steering System; remote steering
Body color Pearl Nebular Black or White
Repower Package Repower Package Plus Repower Package Premium
New outboard(s)      
New rigging tube and connections      
New propeller      
Water separator / fuel filter      
Engine oil      
Miscellaneous rigging supplies      
New controls    
New harness    
New standard gauges  
New steering  
New upgraded gauges  
New battery switch