Thermostat Kit – Fits Mercury/Mariner 70-125 HP 2-Stroke (Replaces 803061T1) 3.3-5 2-Stroke Remove the screws from the

Remove the screws from the raw water pump cover plate

Unbolt and carefully remove the lower unit from the outboard's driveshaft housing

Install the new O-ring and place the new fuel pump assembly in position

Will this stop my boat from porpoising

Features a low amperage draw to reduce load on the electrical system

Thermostat Kit – Fits Mercury/Mariner 70-125 HP 2-Stroke (Replaces 803061T1) 3.3-5 2-Stroke Remove the screws from theProduct Details This Thermostat Kit Fits Mercury Mariner 70 125 HP 2 Stroke (Replaces 803061T1) provides a reliable, direct fit replacement for maintaining the cooling system on inline 3 & 4 cylinder outboards from 1987 and newer. Engineered to regulate engine temperature, this kit ensures your motor operates within its optimal temperature range, preventing both overheating and overcooling. This component is a direct interchange for Sierra 18 3569,