marine blocks
- Thread starter 95stangGT
- Start date
Only Ford marine blocks/engines I have any knowledge of are 351W. there were some 302's used in marine aplications, but I have never heard anything about special marine parts on these, but they could exist.
351W marine blocks are essentaily the same as 69-70 351W blocks (good blocks), and some even have 4 bolt mains. Old "Mercury Marine" short blocks are quite stout, good forged rods and crank, pistons are strong forged but heavy, OMC also used 351W in early years, but do not know about the build, but assuming they were all obtained from Ford, they are likely the same.
**Be carefull if it has a cam in it, the cam could be for reverse rotation**, same goes for the water pumps. Best to change the cam and water pump anyway.
In twin engine set-up's one engine is CW rotation and other is CCW. Also, on long blocks the head gaskets will need to be replaced with automotive ones and extra cooing holes drilled in the heads to match the gaskets. Marine heads and gaskets have smaller holes and less of them, as they do not need them, otherwise they would over-cool and hot spots could crack the heads. In converse, if used in a car without mods, they under-cool and will overheat and warp heads.
351W marine blocks are essentaily the same as 69-70 351W blocks (good blocks), and some even have 4 bolt mains. Old "Mercury Marine" short blocks are quite stout, good forged rods and crank, pistons are strong forged but heavy, OMC also used 351W in early years, but do not know about the build, but assuming they were all obtained from Ford, they are likely the same.
**Be carefull if it has a cam in it, the cam could be for reverse rotation**, same goes for the water pumps. Best to change the cam and water pump anyway.
In twin engine set-up's one engine is CW rotation and other is CCW. Also, on long blocks the head gaskets will need to be replaced with automotive ones and extra cooing holes drilled in the heads to match the gaskets. Marine heads and gaskets have smaller holes and less of them, as they do not need them, otherwise they would over-cool and hot spots could crack the heads. In converse, if used in a car without mods, they under-cool and will overheat and warp heads.
shttygtstang
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- Jun 2, 2004
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