Sport-300 Whale Tail HydroFoil Stabilizer – Fits Outboard Motors & Stern Drives 40-350 HP This marine performance enhancer is designed to improve handling, planing speed, and fuel efficiency for a wide range of outboard motors and stern drives from 40 to 350 horsepower. It mounts directly to the anti-ventilation plate, providing significant improvements in stability and control. This is a direct replacement for parts such as SE Sport 300 HydroFoil, HD300 Whale Tail Stabilizer, and FO2003 Whale Tail Hydrofoil. Installation Method: Bolt-on to the anti-ventilation plate (requires drilling). Housing Material: Premium quality Nylon-PA66 with UV-resistant construction. Included Hardware: Comes with stainless steel mounting screws, nuts, and a drill bit. Compatible Engine Models Confirm your engine model/year in the table below. Compatible With Power Range Stroke Notes Outboard Motors 40-350 HP 2-Stroke & 4-Stroke Not compatible with Volvo Ocean Series XDP Stern Drives 40-350 HP 2-Stroke & 4-Stroke For Volvo SX-A, DPS, DPR, DPH, 280, and 290 series, additional longer bolts and 1 fender washer are needed. Technical Specifications Specification Value Product Type Outboard Motor Hydrofoil Stabilizer Installation Direct mount to anti-ventilation plate with included hardware Connection Bolt-on (requires drilling) Housing Material Nylon-PA66 (Premium quality) Housing Color Black Dimensions H: 17 inches (43.18 cm) × W: 14.4 inches (36.58 cm) Fitting Type Bolted attachment Other Technical Attributes UV-resistant construction; enhanced impact resistance Package Contents 1 × Outboard Hydrofoil Stabilizer 4 × Sets of Stainless Steel Screws and Nuts 1 × 6.5mm Drill Bit 1 × Installation Instruction Installation Guide Step 1: Center the hydrofoil stabilizer on top of the anti-ventilation plate of your outboard motor or stern drive. Step 2: Ensure the hydrofoil is positioned correctly and mark the locations for the four mounting holes. Step 3: Using the included 6.5mm drill bit, carefully drill the four marked holes through the anti-ventilation plate. Step 4: Place the hydrofoil back onto the plate, aligning the holes. Insert the stainless steel bolts from the top and secure them with the nuts from underneath. Step 5: Tighten the bolts firmly but do not overtighten. Ensure the stabilizer is secure and does not move. Note for Volvo Drives: For certain Volvo models (SX-A, DPS, etc.), you may need to source longer bolts and a fender washer for proper installation. Troubleshooting & FAQ Q: How do I know if this hydrofoil will fit my engine? A: This hydrofoil is designed for universal fitment on most outboard motors and stern drives from 40 to 350 HP. It mounts directly to the anti-ventilation plate. However, it is not compatible with Volvo Ocean Series XDP drives. Q: What is required for installation? A: Installation requires drilling into your engine's anti-ventilation plate. All necessary stainless steel mounting hardware and a 6.5mm drill bit are included in the package. Q: Will this stop my boat from porpoising? A: Yes, one of the key performance benefits is reducing or eliminating porpoising. It also helps the boat get on plane faster and stay on plane at lower speeds, improving stability and fuel efficiency. Q: OEM vs. Aftermarket? A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance. Q: How fast do you ship and how much does it cost? A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location. Q: What is your warranty and return policy? A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions. Important Notes Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase. This product is an aftermarket replacement part and is not an OEM component. Professional installation is recommended to ensure safety and optimal performance. Why Choose JLM MARINE? Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally. Fast Global Shipping: Free delivery worldwide in 5–15 days. Direct from Manufacturer: Competitive pricing without compromising quality.
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