Versatile platform that's a great fit for everything from runabouts to pontoons to houseboats

Versatile platform that's a great fit for everything from runabouts to pontoons to houseboats
 

Ample power for a range of pursuits, from towing skiers and tubers on an 18-foot runabout to dual-engine applications on a larger cruiser

Durable V6 configuration affords trouble-free ownership and delivers impressive torque for quick acceleration and planing

Can be paired with Alpha One drive - the most popular sterndrive in the world - or Bravo drives, excellent for cruising applications

SeaCore offers unmatched corrosion protection thanks to industrial hardcoat anodizing, stainless steel components, exclusive low-copper alloy and other advances

Power You Can Count On

MerCruiser's 4.3L sterndrives are built to give you that classic Mercury burst with the stamina to run all day long, and then some. The strapping V6 design lends toughness, power, and efficiency, while ensuring reliable, purring starts every time. Put that all together, and you've got a rock-solid package that's ready for liftoff.

High Tech, Low Stress

You want the performance without the headaches.That's why Mercury is committed to developing innovative and sound technology that contributes to a more seamless boating experience. MerCruiser's 4.3L sterndrives feature Engine Guardian technology that monitors your engine's vitals to help protect your investment for the long-run; power steering reduces the effort needed for steering while providing enhanced hull control at all speeds. Now, that's more like it.

Driven to Perform

A MerCruiser 4.3L engine can team up with several of Mercury's popular drives - including Alpha and Bravo - for robust long-term durability. Standard on Bravo drive models and available on Alpha One drives, Mercathode Corrosion Protection is an active cathodic corrosion-protection system that feeds electrons to underwater hardware and drive units, bolstering your sterndrive's toughness against the corrosive wear and tear of regular use.