Sierra 18-3646 Mercruiser 140 Degree Thermostat Kit
- Brand:
- Sierra
- Part no:
- 18-3646
Where to buy
View on Amazonpaid link
Specifications
- Opens at
- 140°
This is the Sierra 18-3646 thermostat kit, a 140 degree set for MerCruiser engines. It is aimed at Ford and GM V-8 engines from 1982 and older. The kit bundles thermostat 18-3551 with gaskets, including cover gasket 18-2553 and thermostat gasket 18-2844, so the seals come in the same box as the thermostat.
Our take
The 18-3646 kit pairs a 140 degree thermostat, 18-3551, with the gaskets 18-2553 and 18-2844, so one job covers the seals too. It is aimed at Ford and GM V-8 engines from 1982 and older, so check your engine year.