Harken Racing Winch Service Kit for B880 - B1120 Winches10 mm Racing Winch Service Kit 10 Pawls, 20 Springs You should service your winches at least once during the preseason. However, twice a season is best if your boat lives in salt water. If you race your boat hard, you may want to maintain your winches before every regatta. Keep your winches clean and operating smoothly by flushing frequently with fresh water. Check pawls and springs, bearings, gears, and spindles for signs of wear and corrosion.