Some Mountfield engine manual links broken

Thanks to Wot Viewer for noticing that some of the links to the Mountfield engine manuals are broken.  It looks like ServiceLink.org, where many of those manuals are hosted, is changing their site around.  Some of the manuals are still up, just at different locations, and other ones aren't there any more.  Several of the links on the Mountfield engine page have been updated, and more will be updated as new links are found.