Re: 9.9 Johnson Carb Question

[David Stanton]

Thanks for the tips Joe. I’m thinkin’ next week I’ll dig into that motor again. Had to stop to get some other stuff and other motors done, and to get in a better mental state regarding that motor, as I’ve spent too many hours on it curing this and other problems. That timing mark/roller cam alignment is correct, but it’s at the far end of the adjustment, which on this early 9.9 is a screw tightened into a slot on the part that has the arrow on it. Thinking more about it, there could well be some slop in the linkage from the rollercam to carb throttle plate that is messing up the adjustment. This does not have the adjustment screw on the roller assembly that later models have. To take up slop in the throttle linkage, the only way I see to do this is to bend the small rod that links the roller to the carb throttle plate. I’ve seen this bending of a rod as a standard procedure on some automotive carbs I’ve rebuilt.
Dave