Registration is required to post to the Forum, Photo Gallery, and create articles on the site.
In the Forum, choose the Index tab.
For each Category, there is an envelope icon to subscribe.
Click each Category of interest to you (using the drop down box on the top of the Index page speeds up the process a bit) and click the envelope icon.
You should receive email when that Category has a new post.
A PDF file of the Hynautic Owner's Manual