Re: 76 850 idle issue
If that motor is idling at 1800 RPM and you put it in gear it will really bang, and trash your gearcase in short order. Is it really banging?
You need to run the link and synch on that motor. Does the distributor finger still touch the carb lever, when the throttle is in neutral? If so, it is likely at least the throttle cable is out of adjustment. Does the throttle go to the idle stop position, as set by the idle stop screw on the distributor? It should!