More importantly, the MPI version (which supports Mercury’s amazing SmartCraft technology) produces 15% more power than the original two-barrel carb version. But, even with minimal upkeep, it has basic engineering that makes it difficult to kill. The 4.3L appears downright primitive when compared to low-emission petrol outboards with the same power. The engine has been quite popular in both single and twin installations in maritime applications. The MerCruiser 4.3L, according to my old gray cells, has been around since the 1960s, when it was placed in a front-wheel-drive Oldsmobile. A damaged block is a costly repair that may be avoided by taking a few minutes before winter arrives. The engine block will break as a result of this. The water will freeze if it is not removed. This water is retained within the engine.
While boating, your Mercruiser 4.3 uses the water in the lake to cool the engine. You must winterize the motor before storing your boat for the winter.
These engines were also available with a variety of cooling and drain systems. Mercruiser has a long history of producing 4.3L marine engines.
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