SKU: LON52-46745
MPN: 52-46745
The Longacre Waterproof SMI Oil Temp Gauge is a stepper motor–driven analog temperature instrument designed for marine engine monitoring. This 2-5/8-inch diameter gauge reads oil temperatures across a 100–340°F range, making it suitable for both freshwater and saltwater applications where reliable engine diagnostics are critical to safe operation.
The SMI Elite waterproof design protects internal components from moisture, spray, and corrosive salt air—conditions that degrade standard gauges over time. The electric stepper motor provides full-sweep analog needle movement for smooth, visible temperature transitions without jumps or dead zones. The black dial face delivers high contrast readability in bright sunlight, critical when monitoring engine health while underway. Longacre's SMI technology (Stepper Motor Interface) represents a proven gauge standard in marine and motorsport applications where accuracy and durability matter.
This gauge serves both weekend anglers running smaller center consoles and serious offshore fishermen operating larger sport-fishing vessels. Oil temperature monitoring detects cooling system faults, thermostat failure, or bearing wear before catastrophic engine damage occurs—potentially saving thousands in repair costs and preventing breakdown at sea. The 100–340°F range covers typical marine engine operating windows from cold-start idle through sustained heavy-load cruising. Whether powering a bass boat, bay cruiser, or offshore platform, accurate temperature feedback is non-negotiable for engine longevity and crew safety.
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