Home › Forum › Ask A Member › Minimum compression? › Reply To: Minimum compression?
I know this is a pretty old post, but my recent experience has taught me that all compression gauges are not equal. I bought a used Mac Tools compression gauge from eBay that was broken and registered no compression, then a Harbor Freight gauge that gave me readings of 35 lbs, even when testing on a well-running lawnmower. Now I am awaiting a new gauge that should arrive Thursday (that’s what I get for cheaping out). And from what I have read, these gauges can give somewhat different readings from one gauge to the next even on the same motor. My understanding is it is best to get a gauge that gives consistent readings (reliable) and hope the readings are within 10% from one cylinder to the next. Test it on well-running motors, and poorly running motors to see what readings your specific gauge relates to adequate performance for the particular motors you are playing with. Does that sound right guys? And does that add anything to the discussion? I am pretty new to these motors and have a lot to learn.