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Home Inboard and Sterndrives, Inboard Diesel Engines Cummins QSB6.7 250 HP Marine Diesel Engine
Craftsman CM4.80 Marine Diesel Engine | 80HP Auxiliary & Sailboat Power
Craftsman CM4.80 Marine Diesel Engine | 80HP Auxiliary & Sailboat Power $6,190.00
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FNM 30HPE 250 Inboard Marine Engine
FNM 30HPE 250 Inboard Marine Engine $16,500.00

Cummins QSB6.7 250 HP Marine Diesel Engine

1 review

$12,250.00

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Category: Inboard and Sterndrives, Inboard Diesel Engines
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Description

New Cummins QSB6.7 250 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 QSB6.7 250 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

Shipping & Delivery
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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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D
Dylan
Mixed feelings

I recently had the chance to use the Cummins QSB6.7 250 HP Marine Diesel Engine on my boat, and my experience has been somewhat average.
On the positive side, the engine offers good torque and performs well at cruising speeds. It’s also fairly easy to maintain, which is a relief for someone like me who isn’t a mechanical expert. The fuel efficiency is reasonable, making it suitable for longer trips without breaking the bank.
On the downside, I’ve noticed that it can be a bit sluggish when accelerating from a standstill. Additionally, the engine tends to vibrate more than I expected at higher RPMs, which can be a bit uncomfortable while underway.
while the Cummins QSB6.7 has its strengths, it hasn’t completely met my expectations. It’s a decent engine, but I believe there are better options out there for the price. I’d recommend doing thorough research before making a decision.

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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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