Adjusting the linkage:
FSM job 30-300
The engine dying right after starting sounds like you are losing prime.
Old rubber fuel hoses can get dried out and allow air ingress.
Parker 5/16 Super-Flex FL Series 397 hose is an excellent barrier fuel hose (compatible with biodiesel) that I use on my MB diesels.
(Available at your local Parker hose supply or from m*******source.com)
The primer pump before the secondary fuel canister may have a bad diaphragm.
PM me if you need one, I have three on hand.