I'm a bit tired at the moment and not thinking straight. A mate is having problems with his 24 full crank.A couple of years ago I made up an adapter manifold and fitted an LM to it. Has been working fine but he rang last night saying that it starts and runs for a few seconds and stops, prime it again and same deal. I can drive over to his place and fix it but it is a 40 min drive each way. I have told him to remove the fuel tap and blow through it to clear the filter out. When fitting the carby I fitted an inline filter before the carby so I doubt there will be any problem with the main jet filter. The fact it starts and then stops says it is firing up on the primer fuel each time so it is a case of where the fuel flow is being interrupted. The other potential is the float needle, when he presses the primer does it flutter the float and allow a bit of fuel through and then stick up in the seat again? Any thoughts before I drive over and replace another float needle of which most here would realize I am very sick of doing.