This engine features a Roller Camshaft and a Balance shaft for a smooth running power plant. This engine is built by GM as a Marine Engine. Please don't confuse this with others selling automotive engines and calling them marine.
The 4.3 Liter 262 Cubic inch engine is very popular in the 18 to 25 foot runabout boats. This engine is a Direct Replacement for all 4.3 Liter engines produced 1996 and later but will easily replace all 4.3 Liter engines. For early engines you may need to install an Electric Fuel Pump. There is no provision for putting a mechanical fuel pump on the engine.