"I have the same engine with a
"I have the same engine with a similar problem. I assume you have the big 4 cyl. with a mercarb. I would get a hesitation or a "BOGG" when accelerating from idle. I would agree with the other post. if your choke plate is opening up like it should, then you have a lean condition. Check that the accelerator pump is working.With the engine off, have someone move the throttle and see if you get a squirt of gas into the bore of the carb. Did you put back the check ball when you rebuilt the carb? Also, check the timing. There is an argument whether it should be set at 4 or 8 degrees before TDC. My engine runs much better at 8 degrees. Opening up your mixture screw a 1/2 a turn might help a bit. You may need to check you float level. Take the top of the carb off and hold it up side down. Measure from the base with the gasket on to the seam on the float, or what ever your instructions state. My float needle has a small spring in it which holds my float up, I'm not sure if I should compress it down or not, that may be my problem!! Hope this helps, its food for thought
Chris"