Good morning,
Appreciate the replies. The maximum rod length looks like about 6 1/2 inches on this engine. The throttle cables attach to a large lever which in turn connects to the timing mechanism. This main lever also has the stop for the idle adjustment screw. It also actuates the throttle cam lever via the throttle rod which is adjustable. The roller on the throttle plate shaft rides against this cam lever. It looks like the throttle rod length is key to all of the other adjustments and must be right before anything else can be adjusted properly. Right now even when I adjust the idle screw all the way in, the cam lever is still not hitting the roller on the throttle shaft. I did see that someone with a 70HP had set the throttle rod length to 4 31/32". Can't find any definitive info on setting this length for my '79 55 HP. I've got the Seloc manual and it does not have anything on this.
thanks, Mitch