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Home Inboard and Sterndrives, Inboard Diesel Engines Cummins QSB6.7 355 HP Marine Diesel Engine
Cummins QSB6.7 250 HP Marine Diesel Engine
Cummins QSB6.7 250 HP Marine Diesel Engine $12,250.00
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FNM 30HPE 250 Inboard Marine Engine
FNM 30HPE 250 Inboard Marine Engine $16,500.00

Cummins QSB6.7 355 HP Marine Diesel Engine

1 review

$13,350.00

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Category: Inboard and Sterndrives, Inboard Diesel Engines
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Description

New Cummins QSB6.7 355 HP Marine Diesel Engine

* Quiet operation, including an 80-percent reduction in noise at idle, is one of the many benefits from the common-rail fuel systemn* Enhanced sociability from the high-pressure common-rail design virtually eliminates smoke and improves the whole boating experiencen* Maximize vessel performance and access comprehensive vessel diagnostic information via SmartCraft electronicsn* Peace of mind delivered by the Cummins Captain’s Briefing and global service network

Cummins QSB6.7 355 HP Marine Diesel Engine Specifications:

* Configuration: In-line, 6-cylinder, 4-stroke dieseln* Aspiration: Turbocharged / Aftercooledn* Displacement: 6.7 L (408 in3)n* Bore & Stroke: 107 X 124 mm (4.21 X 4.88 in)n* Rotation: Counterclockwise facing flywheeln* Fuel System: High Pressure Common Rail

Dimensions and Weight:

* Overall Length: 1263.8mm / 49.76i* Length of Block: 748mm / 29.45i* Overall Width: 910.6mm / 35.85i* Overall Height: 857mm / 33.74i* Weight: 658kg / 1450lb

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Effective Date: August 9, 2025

At X Factors Motorsports, we are committed to delivering your order quickly, securely, and affordably.


1. Processing Time

  • Orders are typically processed within 1–2 business days after payment is confirmed.

  • Orders placed on weekends or holidays will be processed on the next business day.


2. Delivery Times

  • Domestic Shipping (United States): Delivery takes 5–7 business days from the date of shipment.

  • International Shipping: Delivery times vary by destination and may take 7–21 business days depending on customs processing and local delivery services.


3. Shipping Rates

  • United States: Free standard shipping on all orders.

  • International: Shipping costs are calculated at checkout based on the delivery address, package weight, and destination country.


4. Carriers Used

We ship orders using trusted carriers such as UPS, FedEx, USPS, and DHL to ensure reliable delivery. Tracking numbers are provided for all shipments.

Customer Reviews

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H
Hudson
Strong, Reliable Power for Long Runs

I installed the Cummins QSB6.7 355 HP in my sportfishing boat earlier this year, and so far, it’s been a solid performer. The engine runs smooth, starts easily, and has plenty of power to push the boat fully loaded without straining. Fuel economy is better than I expected for this size, which makes a big difference on long offshore trips.

Maintenance access is straightforward, and parts availability for Cummins has been good in my area. Overall, I trust it when I’m far from shore, and that’s the most important thing. It’s a dependable workhorse that gets the job done.

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    At X Factors Motorsports, we specialize in high-performance engines, outboards, and premium automotive equipment. With expert support, fast shipping, and trusted brands, we help builders, racers, and enthusiasts power their passion — one project at a time.

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