Engineered Marine Products 75-03948 Thermostat Kit 140 Degree for MerCruiser V6 V8 GM Engines

The Engineered Marine Products 75-03948 is a complete thermostat kit designed for 1983 and later MerCruiser V6 and V8 non-high performance GM engines with standard cooling systems. This kit maintains optimal engine temperature at 140°F (60°C) while ensuring proper pressure in the cooling system for efficient heat transfer from the cylinder heads and walls.

Complete Kit Includes:

• 140-degree (60°C) thermostat
• Assortment of gaskets
• O-ring seal

Key Features:

• Fits 4.3L V6, 5.0L, 5.7L, 7.4L, and 8.2L marine engines
• Precision-engineered for reliable temperature control
• Durable construction designed to withstand harsh marine environments
• Helps prevent engine overheating and maintains proper cooling system pressure
• Manufactured to OEM specifications for optimal performance

Cross-Reference Numbers: Replaces Mercruiser/Mercury Marine/Quicksilver 807252Q4, 807252T4, 807252, 23-47508T | Sierra 18-3668 | GLM 13390 | Mallory 9-43150

Regular thermostat replacement is recommended after any engine overheat condition, as thermostats can be damaged by corrosion, sticking, or exposure to extremely high temperatures.