Hi Maverick, and welcome to Outdoorking.
Thanks Grumpy
The symptom you have described - cyclic variation in the speed of a governed engine - sounds like a common problem usually called "hunting". In the great majority of cases, the cause of hunting is lean mixture. Your Victa may have accumulated some crud in its fuel tank and it may be obstructing the filter they usually have in the tank, at the fuel outlet fitting. You will need to clean that filter if it has not been cleaned recently, and verify that fuel flows full-stream from the fuel pipe at the carburetor end, when it is disconnected.
Thank you, I will check this tonight and clean if required and check the flow. I thought heat related because it took a while to start occurring but of course before you start the engine you prime it.
In an unrelated matter, the clearance between the two laminated steel poles of your ignition coil, and the flywheel, should be 0.010-0.012", which is the thickness of an ordinary visiting card. The amount of clearance, and it being equal on the two sides, is fairly important.
Ok there may be a problem here in that case, I noticed that the gap is tight with the two large pieces separated in the middle but the gap with the smaller one piece is probably 3 times the distance. I will check the measurements tonight. I hope the distance can be adjusted without removing the flywheel???
