The pukka job is only about £25 from a Yanmar dealer. worth its weight in gold. (No connection with Yanmar, but owner of as 1GM and a manual that led me through a successful rebuild)
Try right-clicking and choose 'Download linked file' (or the equivalent in your particular web browser). Some machines (esp Windows and IE) will try to display a pdf file rather than download it in the background, and that will take forever.