Cooling System

Indmar Marine Thermostat 160° Drilled – LT1 & 5.7L Fresh Water Cooled Engines | Part #986034 Maintain optimal engine temperature with this genuine Indmar 160° drilled thermostat, designed specifically for fresh water cooled Indmar marine engines. The precision drilled bypass hole ensures smooth coolant flow and prevents air pockets from forming in the cooling system — a common cause of overheating in tow boats. Compatible with: Indmar LT1 and 5.7L fresh water cooled engines fitted to Malibu, Axis, Moomba, Supra, and Tige boats.

Indmar Marine J-Formed Hose with Spring | Part #845040 Ensure reliable coolant flow with this genuine Indmar J-formed hose complete with internal spring. The integrated spring prevents the hose from collapsing under suction — a common problem on marine engines where cooling system pressure and flow rates are critical to preventing overheating on the water. Compatible with: Indmar marine engines fitted to Malibu, Moomba, Supra, and Tige boats.

CHEVROLET THERMOSTAT HOUSING 1 PIECE NLA.-USE 531067S THERMOSTAT HOUSING 2EA 605034 1/2" PIPE PLUGS AND 551004 GASKET. (Remove hoses going to elbow fittings in intake. Install 1/2" pipe plugs in place of those fittings)

Indmar Marine Lower Thermostat Housing – Low Profile E-Coat | Part #531069E Seal and protect your cooling system with this genuine Indmar lower thermostat housing, featuring a durable E-coat (electrocoat) finish designed to resist corrosion in the harsh marine environment. The low profile design ensures a clean, precise fit in tight engine bay spaces — common in modern wake boats where engine compartments are compact. Compatible with: Indmar marine engines fitted to Malibu, Moomba, Supra, and Tige boats.

Indmar Marine Formed 1" 90° Hose | Part #841033 Maintain leak-free cooling System flow with this genuine Indmar 1 inch 90-degree formed hose. Pre-formed to the exact OEM shape, this hose fits perfectly first time — no bending, kinking, or makeshift modifications needed. Purpose-built for Indmar marine engines where precise hose routing in tight engine bays is critical. Compatible with: Indmar marine engines fitted to Malibu, Moomba, Supra, and Tige boats.

Indmar Marine Raw Water Pump – Full Barb | Part #685001 Keep your cooling system flowing with this genuine Indmar raw water pump, full barb configuration. The raw water pump is the heart of your Indmar engine's cooling system — responsible for drawing water from outside the boat and circulating it through the heat exchanger or raw water cooling circuit to keep your engine at the correct operating temperature. Without a functioning raw water pump your engine will overheat rapidly and catastrophically. Compatible with: Indmar marine engines with raw water cooling systems