5 Tandem Trim Mistakes That Sink Fuel Economy and How to Fix Them
Why Tandem Trim Mistakes Drain Your Fuel BudgetEvery boater feels the pinch at the fuel dock, but many don't realize that how they adjust their outboard or sterndrive trim has a direct and substantial impact on fuel consumption. Tandem trim refers to the synchronized adjustment of both engine trim and trim tabs to optimize hull attitude. When done correctly, it reduces drag, improves planing efficiency, and can cut fuel use by 15–25%. Yet common mistakes—like over-trimming, failing to adjust for load shifts, or ignoring trim tab integration—sink fuel economy and accelerate engine wear. This guide identifies five critical errors and shows you how to correct them with practical, field-tested methods.The Stakes Are Higher Than You ThinkFuel is often the largest variable operating cost for boat owners. A typical planing hull burns 20–30 gallons per hour at cruising speed. Even a 10% efficiency loss from poor trim translates to 2–3 extra