Another day with the linkage kit

17th Feb 2006

Today was a day of trial and tribulations and to be honest a day off trying to get the car to tick over at 900 r.p.m. The reason for this low rpm was because my gear box would not easily select reverse when the engine was reving. My Engine had been ticking over at 1200 r.p.m which was a little to fast and I had to bring it down.

I had previously improved the linkage kit by improving the amounts of thread on the adjusters so they had plenty of movement. This however was unable alone to get my r.p.m down. Despite making lots of adjustments the engine still settled after full throttle at the 1200 r.p.m spot. I decided that I needed to pull the linkage back to its stops with some heavier springs. The carburetter linkage bearing plates had a small hole that an extension spring could be positioned in. The right hand carburetor had a hole on the throttle leaver that the other end of the extension spring would fit into . This stiffened up the right hand side. The left did not have a hole so I removed the throttle leaver and drilled a 1/8 hole in it so that the spring would fit. With my new return mechanism in place I thought this would resolve the r.p.m problem , However I was to find that the car still reved at 1100 r.p.m.

I spent some time checking the linkage kit tightening it up so that I had very little movement in it at this point I noticed that the right hand carburetor was the point of trouble. It had a smaller throttle lever and this was not returning. It was late in the evening and I had to leave the problem for the moment as I had run the battery out starting and stopping the car the number of times that I had. I would have to return to this problem another day.

I decided to visit the garage later to pick up the battery to charge it properly. Whilst there I pondered the linkage some more the springs held the left hand side back against the stop and the left was just coming short. The result of this was the right hand carburettor was supplying more fuel at idle. I adjusted the rod so that it was shorter so it pulled up the distance I would have to return with the battery charged and see if this resolved the r.p.m problem but it looked promising.