MerCruiser 4BBL Flame Arrestor 4.3L 5.7L V8 Carburetor Cover Barbron 571710AA Brackets Braces Levers Linkages Yours should have the same

Yours should have the same part number

It clearly is an oil pan for some BBC application

5L 120hp Alpha One Stern Drive Mount

but with normal wear/paint missing/some dings (see pictures)

Acceptable Condition

MerCruiser 4BBL Flame Arrestor 4.3L 5.7L V8 Carburetor Cover Barbron 571710AA Brackets Braces Levers Linkages Yours should have the sameItem Details MerCruiser 4bbl Carburetor Flame Arrestor Stamped Barbron Corp 571710AA I think the manual does reference this as 85785A2, but I know Zenith also made these with that stamping. My guess this is mid 80's but I can't find a specific reference from the manual on this particular flame arrestor For Quadrajet 4 Barrel Carburetors (Roughly 5 1 8" opening) Used from 1979 1986 on most GM V6 & V8 engines with 4 Barrel Rochester Quadrajet