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        • Sherwood G2603 Seawater Pump for Cummins QSC 8.3
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      • SMX Exhaust Turbo Flange for Yanmar 6LPA
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      • SMX Exhaust Turbo Flange for Volvo D4
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      • Analog Instrument Panels
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      • Borg Warner Velvet Drive to Cummins 5.9 HD Adapter Kit
      • Cummins Custom Exhaust Flange Kit
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    • General Boat Parts
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        • Custom Engine & Stringer Brackets
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Product Search

Seaboard Marine stocks a full-line of Cummins Marine Diesel Engines, ZF Marine Transmissions, and Specializes in Parts & Service for Cummins Marine.

Seaboard Marine Featured Products

SMX 1 7/8" Hose Universal Seawater Pump
SMX 1 7/8" Hose Universal Seawater Pump
SMX 1 7/8″ Hose Universal Seawater Pump
not rated $595.00 Add to cart
SMX 1.5" 003 Seawater Pump
SMX 1.5" 003 Seawater Pump
SMX 1.25″ Hose Universal Seawater Pump
not rated $495.00 Add to cart
SMX 12V Electric Clutch
SMX 12V Electric Clutch
not rated $345.00 Add to cart
SMX 1.5 Universal Wash Down Water Pump
SMX 1.5 Universal Wash Down Water Pump
SMX 1.5″ Universal Wash Down Water Pump
not rated $395.00 Add to cart
Cummins QSM11 Marine Turbo to Exhaust Manifold Stud & Nut Kit
Cummins QSM11 Marine Turbo to Exhaust Manifold Stud & Nut Kit
not rated $55.00 Add to cart
Cummins Marine Turbo to Exhaust Manifold Stud & Nut Kit
Cummins Marine Turbo to Exhaust Manifold Stud & Nut Kit
not rated $35.00 Add to cart
Cummins QSM11 Exhaust Flange
Cummins QSM11 Exhaust Flange
Cummins QSM11 Custom Exhaust Flange Kit
not rated $225.00 Add to cart
Cummins Marine Powered by QSC 8.3 Decal
Cummins Marine QSC 8.3 Engine Sticker
not rated $8.00 Add to cart
Cummins Marine Powered by QSB 5.9 Decal
Cummins Marine QSB 5.9 Engine Sticker
not rated $8.00 Add to cart
Cummmins 330B Diamond Performance Series Decal
Cummins 330B/370B/450C Diamond Performance Series Engine Decal
not rated $8.00 Select options
SMX Digital Voltage Monitor
SMX Digital Voltage Monitor Faceplates
SMX Digital Voltage Monitor
not rated $19.00 Add to cart
Cummins Marine Diamond Performance Series Engine Sticker
Cummins Marine Diamond Performance Series Engine Sticker
not rated $12.00 Add to cart

Recent Tony’s Tips Articles

QSB5.9 vs QSB 6.7 HPCR Fuel System Aftercooler Discoloration from High Loads or Turbo Boost Cummins Marine QSM11 Dry to Wet Conversion Magnetic pickup location above the flywheel on the engine bellhousing Crankcase Ventilation Cummins SmartCraft DieselView Display B-Series 3-Bolt Starter Motor Cummins 4BT Turbo at 33000+ hours — from a 47Kw Custom SMX generator Starting with a "factory" inline muffler shape applicable to the install. Heat Exchanger in Need of Service 100% Genuine Cummins complete Aftercooler for Cummins B Series Engine ZF Troll valve Safety Switch & Control Lever QSB WIF Plug Location Typical Signs of a Sherwood Seawater or Raw Water Pump Leakage Fuel and Horsepower Always On Power Studs for SmartCraft v1.0 Engines Simple & Effective Isolated Squeeze Bulb Priming System using Clear Vinyl Hose I think the value of this type in installation is 100% obvious to most anybody that has gone through priming a diesel engine in a vessel from both the practical and safety standpoint when you have to get your engine running - In other words, I suggest you just forget about the politics of "squeeze bulbs" that come from ignorant boaters and the typical wharf rat that thrives on "dock talk". Oil Pressure Port Locations for Cummins 6CTA 8.3 QSB Seawater pulley configuration - Old & New Cummins QSB 5.9 Cummins Marine Engine Oil Pressure Specifications Cummins QSC 8.3 Cummins Marine 6CTA 8.3 M4 (480CE) Stall Stumble ECM Fix Early Style ZF 280A Marine Transmission Bosch P7100 Injection Pump Oil plug Cummins Marine 6BTA 330B or 370B Throttle Cable Bracket 6BTA JWAC - Boost Hose to Aneroid & Measuring Fuel Pressure Hynautic Cylinder Chart Cummins CPL 970 & Welded Aftercooler Designs Cummins Marine Exhaust Flange Pyrometer (EGT) Location Cummins Position Sensor Bosch Fuel lever tied up for testing QSM11 Wet Exhaust Riser Test Port Location 6BTA 5.9 Belt Wrap with 21SI-28SI Alternator Aftercooler Assembly Cummins 330/370 5.9 Manifold Output The Story of Cummins & Mercury SmartCraft Cummins 450 Diamond

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What We Do

Seaboard Marine delivers “Guaranteed Better Than Factory” Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. We’ve been serving the local Ventura and Oxnard areas of California since 1980 as a custom boat builder, repower specialist, designer, and supplier of equipment to builders, commercial fishermen, and recreational users. Seaboard also ships Internationally every day to support the Cummins Marine brand across the globe.

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Repower Projects

"Windstone" is owned by David Sharabani of Santa Maria, California. He's an electrical contractor that is trying to find time to go fishing now that he's got a serious fish machine that can run with the best of them! The vessel has the typical " Seaway" look. A little commercial, but still has those lines that appeal to so many. Don't know if you are aware of the Seaway heritage, but just about all of the "Baywatch" boats, here in So. Cal. were made by them...... Widgeon Repower SHOOTER The 4 Year 40 Knot 31 Foot Bertram Odyssey

Featured Articles

  • Heater Hookup Ports for Your Marine QSB 5.9 Cummins November 15, 2018
  • A "Low Hour" Engine “Marine Age” the REAL age of a Marine Diesel Engine January 10, 2018
  • Propellers Move Boats, Engines Just Turn Them January 8, 2018
  • Cummins QSB 380 in a 27 ft Farallon - 4" dry to 5" mixer. Under 25" H2O at WOT. Everything you Need to Know About Marine Exhaust Systems January 6, 2018
  • Cummins QSB 5.9 Continuous Duty – A Different Perspective January 4, 2018
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