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Sierra 18-1997-1
but still had fuel in it during disassembly
These were used in tons of different Mercury / Mariner Outboards and a few models were plastic
7L 224CID "470"
Stamped Part number is 3973457N
MerCruiser 73999 120hp 2.5L 140hp 2bbl Flame Arrestor Carburetor Cover Top Trim Tab Parts Sierra 18-1997-1Item Details MerCruiser 2bbl Flame Arrestor Barbron Corporation 571204AA 2 5 8" I. D. Throat on this for Rochester 2bbl carburetors Tab where hose typically attached to appears to be missing on this. Part Numbers Included 73999 Flame Arrestor (superseded to 86270 which looks a bit different but functionally the same) 32 62060 Vent Hose, carburetor to rocker cover. Compatibility Generally Found On MerCruiser 120hp 2. 5L 140hp 3. 0L 4cyl 165hp 4. 1L