Greetings
damianf, and a warm welcome to both the ODK Forums, and the fraternity of SB/Rover 45 owners.
That spring looks correct, but the bend in the wire link next to it doesn't look right to me, at first glance.
Anyway, for a start, we need the engine's Model, Type and Code numbers, which will be stamped into the 'square' section of the cowling somewhere. On older Briggs engines, they are adjacent to the carby. With those, we can find the parts list for that specific engine.
