I have a problem w/ my mower (Gravely) in that it boggs down and I have to slow the speed down to a crawl in order for it cut and not die out. It has a new carb, new fuel pump and tanks have been cleaned. The coils have been reset to .008 and the valves have been reset to .005 also. Compression runs about 115 -120 and I have checked clutch PTO and all the pulleys to make sure nothing is binding. Last night I tried to adjust the jets on the carb w/ no luck. Does anyone have a suggestion? I am not sure which is the low and high speed adjustment, Help! I am out of ideas.....