zimtuff, the G4 had the adjustable idle screw cap, the LM didn't, I can't find anything different between them apart from a black poppet and cam, but hard to tell with the cam, Victa seemed to be trying all sorts of cam profiles to try and get them to work. Problem is as you say the plug is dry, this is because the float needle, even if it is new and the primer cap is new, the needle either sticks up in the seat, or it won't shut the fuel off, rubbish design, and poor quality replacement parts. Where is the fuel leaking from, if it is coming out the breather hole in the primer bulb, means the needle isn't sealing. The fact the plug isn't wet, I would say the needle is sticking up. A light sanding of the 3 ribs on the sides of the needle sometimes helps to make it drop. with the cap off if you put the needle in and the float on you can hold it up and by raising and lowering the float the needle should follow it up and down
