Welcome to Defender Canada! 
Description
The Sierra Mercruiser Thermostat Kit 18-3568 is designed for GM V-6 and V-8 Mercruiser engines with closed cooling systems (1998 & newer). Featuring a 160°F thermostat, it helps maintain optimal engine temperature for reliable performance. This kit is a direct replacement for Mercruiser part 99155T1.
Sierra Mercruiser Thermostat Kit - 18-3568 Item # 1780937
Description
Features:
- Fits: GM V-6 & V-8 engines with closed cooling (1998 & newer)
- 160°F
Fits:
- 5.7L MIE 0L002003 & Up
- MX6.2L MPI 0L680003 & Up
- 454 Horizon MIE 0L002200 & Up
- 502 Mag MPI 0L01700 & Up
Replaces:
- Mercruiser Stern Drive:
- 99155T1