When I got my Snapdragon 23, although the engine was seized and no part of it servicable - I did get a service leaflet, and a parts catalogue/owners guide

the tillotson HL carburettor manual is here

The owners guide is in pdf format, and will take a while to load

there doesnt seem to be a downloadable vire7 manual yet, but i have one i will scan in soon, however the vire 6 manual is darned good....

The original Vire BVR manual is available, in PDF format, on a Dutch website that specialises in making old out-of-print manuals available for everybody. It is presented as two very big files, of 2.91 MB and 1.75 MB, so be prepared for a slow download.

http://www.boten.nl/motoren/motoren_pdf/vire-bvr1.pdf

http://www.boten.nl/motoren/motoren_pdf/vire-bvr2.pdf

You'll need Adobe Acrobat to read PDF files. If you don't already have it, Adobe Acrobat Reader is available as a free download.

VIRE PARTS AND SERVICE MANUAL

with kind permission, I have scanned in the PRACTICAL BOAT OWNER - JUNE 1967 article on tuning and servicing the Vire BVR6 which is similar/identical to the 7

Click the section on the left - below is a summary:..

COVER

PAGE1 "Have you a Vire down Below asks John Watney

PAGE2 Meet the Vire, plug, carb,filter,points, timing

PAGE3 magneto, lubrication

PAGE4 servicing, decarbonising, top end overhaul

PAGE5 tillotson carb setup, starting instructions, propshaft assembly