The Marine 122ºF 50ºC Outboards Thermostat is a perfect addition for your boating needs. Designed to work with a variety of 2.5 Hp to 6 Hp 4 Stroke engines with 25-30-2 cylinder capacity, this thermostat can be used for both 2.5 Hp and 3.5 Hp engines. It offers precise temperature control, ensuring optimal engine performance and longevity. The thermostat's temperature range, from 122ºF to 50ºC, covers the majority of standard marine engine operating temperatures. With its easy-to-install design and durable materials, this thermostat is a reliable choice for your boating adventures.