oil pump parts querry

[two-stroke-brit]

i am reassebling my 73 buffalo and i opened the ziplock bag with the parts from the oil pump when i removed it and have two parts i dont regognise ,
i looked in the manual and i dont see them but they must have been involved as i put them in the bag what seems like a lifetime ago ,

its the spring and the square plastic thing that stumps me the nipple i am ok with how and where .






any help allways welcome,thanks mark.

[Triplerocky]

They are "custom" parts...I did the same on my GT380 because of the stuck oil pump arm. There is a known problem with the oil pump, after some service years it wont always come back to the rest position..so you have to find a solution....a spring and a stopper is fine

[H2RICK]

Someone has used a headlight adjusting spring and its associated plastic nut, as a spacer probably.
That spring is waaaaayyyyyy too strong for the intended purpose and is going to stretch your pump cable like crazy...if not cause it to fail waayyy earlier than it might normally. Most of the "sticky pump arm" problems occur in the early life of the pump rather than later. There is a service bulletin covering this very problem. If your pump has 3000+ miles you should NOT have a sticking problem. If you HAVE such a problem, the situation needs looking into for causes OTHER than what the SB addresses.

[tz375]

Most "sticky Pump" problems are not a problem at all. The design is such that the lever/arm only returns to the static position when the pump is on one position. In other positions, the arm appears to hang up and is hard to force back closed.

That is a design function. see http://pinkpossum.com/GT750/Oilpump.htm for more on the pump design. It doesn't provide a full explanation, but it's a good place to start.

As for the two components. They belong in the bin and have no place on an oil pump.

[two-stroke-brit]

many thanks to all.
mark