GLM 13550 Thermostat Housing+Cover Fit Mercruiser V6 V8 w/Closed Cooling 55131A5

Replaces OEM #55131A5. Thermostat temperature: 140 ℉, 140F. We will discuss with you as soon as we receive your letter. 230 MIE - 1981-1986 - Serial number range 5907058-0B5225505. 230/5.0L MIE - 1987-88 - Serial number range 0B522506-0B788151.

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