New repower engine option from Quicksilver
Mercury Marine brand Quicksilver introduced the new 409 MPI Bravo engine at the Land ‘N’ Sea Marine & RV Show in Las Vegas last week (13-14 October 2022).
Featuring a flat-plane crankshaft for increased torque and horsepower generation, Quicksilver says its new engine is an ideal option for repowering classic boats. It is more compact and up to 150 pounds lighter to deliver more fuel efficiency than comparable big-block marine engines.
“How often is a repower an instant head-turner?” says Mike Horak, Quicksilver’s engines category director. “Repowering with a 409 MPI Bravo engine is not just a repair, it’s a fundamentally different and exciting experience. When the captain leans into the throttle, this engine will provide an amazing amount of authority and thrust. They’ll be able to manoeuvre the boat effortlessly.”
Rated at 400hp, the 409 MPI Bravo engine is designed to replace non-catalyst 6.1L, 7.4L, 8.1L or 8.2L sterndrive engines in 21- to 31-foot single-engine boats, and 28- to 38-foot twin-engine boats built before 2010 (prior to 2008 in California).
The 409 MPI Bravo engine also features freshwater cooling, a Quicksilver cast-iron V8 engine block, aluminium cylinder heads and multi-point fuel injection. Designed to operate on 87 octane fuel with up to 10 per cent ethanol, it features ceramic-coated forged pistons, Black-X composite valves and other forged internal components to deliver reduced wear and extended engine life.
Compatible with Mercury SmartCraft digital gauges, displays and analogue controls, the 409 MPI Bravo engine can be retrofitted into single- or twin-engine boats with standard or magnum transoms and MerCruiser Bravo One X or Bravo Three X sterndrives.
When retrofitting, the company says typical required modifications include new engine mounts, adjustments to exhaust components and regearing the sterndrive unit to compensate for the 409 MPI engine’s higher rpm range.
