micahbennett Posted December 24, 2012 Share Posted December 24, 2012 I have a 1959 mack firetruck with a 707cui gas motor in it. Let me give ya a little back story. I work at the macungie mack plant and i thought it would be awesome to own a antique mack. So i bought one. My kids love it. So i was giving it a simple tune up before a parade and i snapped a sparkplug off in the cylinder. I then proceeded to snap off a easy out in the cylinder. To make a long story short i removed the head and piston took all the chunks out and put everything back together. It runs fine. That was for a little. I did not hook back up the govener rod to the carb. Again at first it didnt seem to matter but now when i start it, it revs at like90 percent throttle the whole time. Please help me. Quote Link to comment https://www.bigmacktrucks.com/topic/28994-constant-high-revs/ Share on other sites More sharing options...
rsb502 Posted December 24, 2012 Share Posted December 24, 2012 I cant help ya but I think I know who can, call Pine Hill Restorations, they restore old Mack Fire Trucks and rebuild Mack carbs they even have wiring harnesses for the old Gas engines 717-566-8973. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/28994-constant-high-revs/#findComment-152997 Share on other sites More sharing options...
micahbennett Posted December 26, 2012 Author Share Posted December 26, 2012 Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/28994-constant-high-revs/#findComment-153362 Share on other sites More sharing options...
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