Premium power for classic sterndrive and inboard cruisers and performance boats
Lightweight, smooth and quiet, the 400hp 409 MPI Bravo engine features a flat-plane crankshaft that generates serious torque and horsepower, delivering an exciting boost in speed and hole shot when repowering classic sterndrive and inboard boats. Durable and efficient, the 409 engine can provide years of additional fun on the water.
- Fuel-injected for surefire performance in all conditions
- Compatible with Mercury® SmartCraft® digital gauges, displays, and controls
- CARB & EPA compliant (requires old engine return for repower)
- Black-X composite valves reduce valve wear and help extend engine life
- 3-year limited warranty
Power | 400hp (298 KW) |
WOT RPM | 5000-5800 |
Displacement | 409 cu in (6.7L) |
Engine Type | Quicksilver V8 Iron Block and Aluminum Cylinder Heads with Black -X Composite Valves |
Bore & Strock | 4.035 x 4.00 in (102 x 102mm) |
Compression Ratio | 9.4:1 (with ceramic-Coated Forged Pistons) |
Fuel Compatibility | 87 Octane Minimum / up to 10% ethanol |
Engine control system | ECM 555 with SmartCraft Can Capability |
Fuel-Delivery System | Gen 2 Cool fuel (4 bar) |
Fuel-Injection system | Multi-point injection |
Induction system | single-plan intake with 4-blade throttle body |
Ignition system | HVS with fixed-gap Spark Plugs |
Charging system | 65 amp (917 watts) |
Water Drain System | single-point air-actuated |
Exhaust System | Dry Joint |
Cooling System | Closed Cooling, Long-Life 5-year antifreeze, brass seawater pump |
Accessory Drive System | Serpentine Belt |
Lubrication system | High-flow 100 psi oil pump, 140F oil thermostat, and copper oil cooler |
Recommended engine oil | SAE 25W-50 NMMA Certified FC-W Full Synthetic |
Audio Warning system | oil pressure, coolant temperature, drive lube, seawater pressure, low voltage, over-rev control (6150 RPM) |
Bravo One X Gear ratio | 1.65:1 |
Bravo Two X gear ratio | 2.00:1, 2.20:1 |
Bravo Three X Gear Ratio | 2.00:1, 2.20:1, 2.43:1 |
Dimensions (LxWxH) | 34.5 x 29.6 x 35.8 in (876 x 752 x 909mm) |
Engine Weight | 985 LBS (447kg) |
Boat Harness Type | 10-pin |
Replacement for 21- to 31-foot single-engine boats and 28- to 38-foot twin-engine boats built before 2010 (prior to 2008 in California) and powered by 6.2L, 7.4L, 8.1L or 8.2L sterndrive and inboard engines.

Parts orders placed before 2:30 pm EST will normally be shipped the same day (if the item is in stock). If you need your parts asap, FedEx Overnight, second-day air, etc., are also available (Deadline is 2:30 pm Eastern standard time). Engine orders will be processed and shipped within 24-48 hours after payment-in-full is received. For special engine orders, shipping time is based on current stock and build time.
Please Remember - No Walk-Retail is Available See Pickup In-Store Procedure
All part orders must be placed online. You may select “In-store pickup at our company” if you prefer to pick up your order. We will text and call when ready for pickup.
Items under 75 pounds are sent via FedEx in Continental USA. Items sent overseas are sent via FedEx international, or air freight (depending on item weight). FedEx cannot ship to P.O. boxes.
All Packages over $175.00 will require FedEx obtains a signature from someone at the delivery address; from a neighbor, building manager, or someone at a neighboring address; or the recipient can also leave a FedEx Door Tag authorizing the release of the package without anyone present, or you can sign up for FedEx Delivery Manager.
We ship parts and engines worldwide! **MERCURY BRAND ITEMS CAN ONLY BE SOLD AND SHIPPED TO ADDRESSES WITHIN THE UNITED STATES.
Canadian Shipments
Rates for Standard service to and from Canada do not include charges for customs clearance. For shipments from Mexico, routine customs clearance is included. Customs brokerage charges, duties, and taxes will be billed to the importer unless otherwise indicated by the shipper. Some shipments to and from certain locations may require additional time in transit.
Engine Shipping
For a shipping quote, please email sales@michiganmotorz.com or call (248) 524-9600 with your shipping address and contact information. We use different freight carriers to secure the lowest price AND safest delivery. Some of the freight carriers we use are R&L Freight, Con-Way Freight, Estes Express, Pilot Air, USF Holland, Forward Air, Old Dominion, Overnight Express, Watkins, and Dayton Freight. Engines can be picked up at local shipping terminals or dropped off at your location. **Engines are packed in specially designed crates made for that engine**
All oil & lubricating fluids are drained before they are sent out (this is required by our freight carriers). All engines & parts are packed by our shipping department. Engines are then inspected by our shipping manager before they are loaded onto a freight carrier.
**Certain restrictions apply
Returns
For items received as described, a refund of the final invoice price (minus shipping and handling charges and a 15% restocking fee) will be issued. Buyer is responsible for return shipping costs and for sufficiently packing and insuring returned items unless otherwise agreed upon. Refunds will not be issued for damaged merchandise. All returns must be made within 15 days of delivery to you. No refunds for electronic parts if the box is opened. All returns must have an RMA # and invoice #. 15% restocking fee on the return of any complete engine. Please call or email for an RMA #.
Returns must be shipped to: Michigan Motorz, LLC 32333 Mally Drive Madison Heights, MI 48071 (248) 524-9600
If parts arrive damaged in shipment, it is the customer's responsibility to notify the carrier immediately and reject the damaged package. Contact Michigan Motorz regarding the potential damage. A claim will be filed and we will send out the identical part. If parts are damaged in shipment and the customer does not notice damage, please call Michigan Motorz, LLC.
