Indmar Marine Thermostat Kit – 5.7L | Part #491010
Service your 5.7L cooling system with confidence using this genuine Indmar thermostat kit — a complete kit containing everything needed for a full thermostat replacement in one part number. No hunting for individual gaskets or hardware — everything included, ready to fit.
Compatible with: Indmar 5.7L marine engines fitted to Malibu, Moomba, Supra, and Tige boats. Contact us to verify fitment before ordering.
Kit vs thermostat only — why the kit?
Replacing a thermostat without replacing the housing gasket is a false economy — an old gasket on a freshly serviced thermostat housing will leak. The kit ensures a complete, leak-free cooling system service every time with no missing components and no mid-job delays.
Signs your thermostat needs replacing:
- Engine overheating or running hotter than normal
- Engine slow to reach correct operating temperature
- Coolant temperature fluctuating erratically underway
- Coolant loss from housing area
- Scheduled cooling system service due
Pro tip: Replace your raw water pump impeller at the same service — the cooling system is already partially drained making it the ideal time to refresh both the thermostat and impeller together for complete cooling system confidence heading into summer.
Pairs perfectly with:
- 685007 – Raw Water Pump Impeller
- 685001 – Raw Water Pump Full Barb
- 866081 – Thermostat Housing Aluminium Full F/W
- 551045 – Water Circulation Pump 383/350
Features:
- Genuine Indmar OEM thermostat kit
- Designed specifically for Indmar 5.7L marine engines
- Complete kit — thermostat and all required components included
- Ensures leak-free cooling system reassembly
- Direct replacement — no modifications needed
Part Number: 491010
In stock and shipped fast from Australia 🇦🇺
