Re: Distributor question

Posted by DavidM On 2018/7/31 18:59:38

The distributor drive shaft is driven off a gear on the cam shaft and it would be possible to install it one or more teeth out. The two gears have helical teeth allowing them to mesh with their axes at 90 deg. The gear for the drive shaft has a square hole that receives the square drive shaft. The top of that shaft has an offset slot . So there are 4 positions for the drive shaft in the gear and two for the distributor to the shaft. You can simply lift out the drive shaft and refit it in any of the 4 positions then try the distributor in either of the two positions. I don't know if that will improve your problem. Simple enough to try.

Removing or re-timing the distributor drive gear would require you to separate the crankcase from the cylinder block . That is unthinkable compared to using longer HT wires.

This all from memory some time ago on my earlier model cars but I am guessing the 740 is the same.