SEI SE429 Yamaha LF250 Counter-Rotating Lower Unit 2.00:1The SEI SE429 is an aftermarket counter-rotating replacement lower unit for select Yamaha LF250 outboards. Featuring a 2.00:1 gear ratio and a water-cooled bearing carrier, it is available with a 25" or 30" driveshaft to match your engine application.This item is subject to a 20% restocking fee.Year, serial number, and horsepower are required to process your order. Please contact us with this information after placing your order. Processing will be delayed until this information is received.Features Counter rotation for compatible port-side applications; 2.00:1 gear ratio; Water-cooled bearing carrier; 25" or 30" driveshaft options; Black finish; paint to match your engine if desired; Applications and Replacement References 25" SEI 90-429-B25F: For select Yamaha LF250XA, LF250TXR, LF250BTXR, and LF250TXRD applications. OEM reference: 6P3-45300-41-8D.; 30" SEI 90-429-B30F: For select Yamaha LF250UA, LF250TUR, LF250BTUR, and LF250TURD applications. OEM reference: 6P3-45300-51-8D.; Fitment varies by model and year. Confirm your full engine model number, rotation, gear ratio, and shaft length before ordering. Horsepower alone does not confirm compatibility.