Oil Preheater Dry Sump Tank 4in Element Steel

The STEFS Performance Products Oil Preheater Dry Sump Tank with 4-inch Steel Element is a 195-watt immersion-style engine oil heater designed to maintain optimal viscosity in marine engines during cold-start conditions. Operating on standard 110V/120V household current, this screw-in preheater uses a submerged heating element to warm oil before engine ignition, reducing startup wear and improving cold-weather reliability for boats stored in temperate or seasonal climates.

Rated at 195 watts, the heater delivers consistent thermal output without drawing excessive electrical load. The 4-inch element length fits standard dry sump tank configurations, while the 12 AN male O-ring steel fitting provides a corrosion-resistant connection suitable for saltwater and freshwater environments. The 3-foot power cord allows flexible positioning near a dock-mounted outlet or portable generator, making it practical for both slip-side and remote launch scenarios. Compact dimensions (7.6 x 1.4 x 7.85 inches) and a lightweight design (0.87 lbs) allow easy installation into existing tank layouts without significant modification.

This preheater addresses a critical maintenance challenge for marine engine owners: cold-start viscosity. When oil thickens in cool temperatures, bearing surfaces experience momentary starvation during initial cranking, accelerating wear. Weekend fishermen and serious offshore anglers benefit from reduced engine stress during spring commissioning and fall storage cycles. The AN male O-ring fitting integrates with standard performance and custom dry sump systems, making this heater compatible with both stock engines and modified high-performance installations.

Dry sump oil heating remains an underutilized but effective preventive maintenance strategy for engines subjected to irregular use, temperature swings, or extended layups. Unlike block heaters that warm the entire engine, an immersion preheater directly conditions the oil itself, reducing warm-up time and extending bearing life on engines that experience frequent cold starts.