G.M. 4.3L Marine Long Block , 2 piece rear main seal
4.3L GM Marine Long Block , 2 piece rear main seal
GM direct replacement engine for the older 1986- Mercruiser, OMC, and Volvo. It can be easily identified by the 12 bolt pattern intake manifold. This is a non-Vortec engine, non-balance shaft design,, fuel pump pad, and 2 piece rear main seal. The long block engines with no intake, flywheel, balancer, or water pump.