Camshaft Belt for Yamaha F40A/F50A/F60A & Mercury/Mariner F40/F50 – Premium Quality High-quality aftermarket belt (Made in Japan) with 106 teeth, compatible with Yamaha and Mercury/Mariner 4-stroke outboard engines. Number of teeth: 106 Recommended replacement interval: Every 1,000 operating hours or every 5 years, whichever comes first. Compatible Yamaha models: F40 – 60K (2002) F40 – 66W (1999–2002) F50 – 60A (2003–2010) FT50 – 61S (2003–2007) F50 – 62Y (1995–2007) FT50/T50 – 64J (1996–2002) FT60/T60 – 68S (2003–2006) F60 – 69W (2002–2007) Compatible Mercury/Mariner 4-stroke models with belt tensioner: 40 hp 4-cylinder – Serial number 0G231123 to 0P094499 50 hp 4-cylinder – Serial number 0G231123 to 0P094499