+1 on thanks, to our CyberJack, for this one.
Yes, these Victa-published service manuals were freely available for sale to retail customers, initially via the Victa servicing dealer network - there was nothing to restrict we dealers ['commercial in confidence' restrictions etc] from doing that. So we did.
That was entirely the purview of we dealers, until Gregorys/Scientific Publications took over publishing of the Victa Repair Manuals in 1974. Which resulted in these manuals becoming available via the motor parts trade, and technical booksellers. A good move all round!
Of course the big box stores [who started flogging storebrand Victas in the early 1970s] couldn't/wouldn't offer much after sales support; in terms of either servicing references/info, or parts. Blade and bolt sets, and air filter elements, were about all they would stock.