Thermostat Housing Cover Mercruiser V6 V8 w/closed cooling 55131A5 5.0 5.7 4.3Th

230 MIE - 1981-1986 - Serial number range 5907058-0B5225505. 230/5.0L MIE - 1987-88 - Serial number range 0B522506-0B788151. 260 MIE - 1981-86 - Serial Number range 5907058-0B522505. 260/5.7L MIE - 1987-93 - Serial number range 0B522506-0F024999.

eBay