hi i have a newish victa 2 stroke master ? i went to use it the other day expecting it to fire up straight away as usual anyway as i went to prime it the primer plate was hanging off,( white disc with black bulb pipe inlet and a center hole g4?) so to my question what holds the plate on? does it just push on there is no fixing that i can see, also while i was looking for a screw or some other type of fastener to hold it on, i withdrew the center screw only to find it was a jet (i think) so i put it back, does this have a particular setting IE fully in then i turn back or what? i did subscribe to be able to use the on line manuals but it will not allow me access ? (i did as suggested, cleared cookies and signed back in but no joy) all help much appreciated, steve