986034 THERMO 160° DRILLED .100 LT1 and 5.7 F/W

Picture of 986034 THERMO 160° DRILLED .100 LT1 and 5.7 F/W

986034 THERMO 160° DRILLED .100 LT1 and 5.7 F/W

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.
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Manufacturer : Indmar
SKU : 986034
Price: $115.00
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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.

Why a 160° thermostat?
Running a 160° thermostat keeps your engine in the ideal temperature range for performance and fuel efficiency — particularly important in Australian summers where water temperatures are higher and engines work harder.

Why does it need to be drilled?
The small bypass hole allows a controlled flow of coolant even when the thermostat is closed, preventing hot spots and allowing the engine to warm up evenly. Always replace with a drilled thermostat — never a solid one on these engines.

Features:

  • Genuine Indmar OEM part
  • 160° opening temperature
  • Precision drilled .100" bypass hole
  • Designed for fresh water cooled (F/W) systems
  • Direct replacement — no modifications needed

Part Number: 986034
In stock and shipped fast from Australia 🇦🇺

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