Fuel injection pumping apparatus

A fuel injection pumping apparatus comprising a housing, a distributor member rotatably mounted in the housing, means coupling the distributor member to an engine so that the distributor member is driven in timed relationship with the engine, a bore formed in the distributor member and a pump plunger mounted therein, a cam ring mounted in the housing and having cam lobes, a roller which during rotation of the distributor member co-operates with the cam lobes to effect inward movement of the plunger, a passage in the distributor member communicating with said bore, outlet ports in the housing and with which said passage registers in turn during inward movement of the plunger, means for feeding fuel to said bore during the time when the plunger is permitted outward movement by the cam lobes, a fixed stop ring positioned on one side of the cam ring and engageable by one end portion of the roller as the plunger moves outwardly, an annular and angularly adjustable stop member positioned on the other side of the cam ring, a plurality of pivotal stop links positioned adjacent the other side of the cam ring, said links being positioned inwardly of said stop member, said links defining inner surfaces engageable by the other end portion of the roller and outer surfaces engageable by lobes respectively carried by said stop member, whereby the angular setting of said stop member will determine the position of said stop links and thereby the extent of outward movement of the roller, first means operable from the exterior of the housing to allow movement of said stop member to a position in which an excess of fuel will be supplied for starting purposes and second means for determining the setting of said stop member so that during normal running of the associated engine no more than a permitted maximum amount of fuel will be supplied to the engine.