G'day folks,
There are a few asked questions to cover here, so I'll address them in posted order.
WCE, as has been said, the fitted carby on your Mayfair is indeed a rare G2 [well spotted, MarkN], and the spare is a complete G3 assembly [carby, cable and throttle control].
The non-serviceable air filter unit was a short-lived Victa idea of that time, and was usually replaced by the serviceable AF07381A short filter unit when a machine came in for service. The non-serviceable unit was a PITA, as there was no simple way of checking the element condition.
The only external difference in the housings, is that the AF07381A has a tab on the cap, making it easy to pop off.
MarkN, the white cable is indeed the cutout switch lead. These G2 models were the first series of 2-stroke Victas to have this feature.
The lead runs from the magneto to the throttle control on the handle, within a plastic sleeve that also covers the throttle cable. At the top end, the cutout lead connects to a brass terminal strip riveted to the plastic filter housing, and the steel throttle lever performs the switch function.
CyberJack, maybe Victa just didn't think that the governed engine made that much difference, to the operator of the machine! And yes, the G2 was very short-lived; the 1969 season for sure, and maybe part/all of the 1970 one.
As for advertising, the G2 is mentioned and shown in the 1969 season brochure;
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/77945/brochure-1968-69-range.htmlThe 1970 season brochure is a bit ambivalent; the carby pic shows a G2, but the Series 70 cutaway engine pic and photo clearly show the G3! And the 'G3' designation is mentioned in the text.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/75923/catalogue-victa-1970-range.htmlMaxwestern, the other major issue I recall seeing in G2's, was wear in the bore that the stem of the relatively heavy metal governor vane passes through. Once that was worn, the governor gears would slip a tooth or two, and throw out the governor adjustment.
It wasn't worth rebuilding a G2 with a worn body even back in the day; the swap to a new G3 and G3 throttle cable was cheaper and much easier.
The stop switch lead just needed shortening a bit [allowing for a loose turn around the 'flag pole' to reduce flexing] , and crimping on a female spade terminal.
As far as introduction dates go, for the G2, Victa's Servicing Guide No. 63 was issued in September 1968, which aligns with the 1968-9 season brochure.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/58949/victa-service-guides-1960s.htmlUnfortunately we don't seem to have the equivalent Tech Bulletin for the G3 here at ODK.
