Can't find Yamaha "F4AMH) model listed on any web site

[fishon71]

I'm try to fiqure the year of this 4hp four stroke Yamaha model# F4AMH and it does not come up on any web site. Can someone tell me the year and why I can't find it on the Yamaha parts web site? Do they have diferent model numbers not listed for different countries?

68D F4AMH 4hp four stroke - thanks