Seems fine to me. Pull start motors generaly have lower compression readings than average. The most important thing, as noted above, is that the readings are within 10% on each cylinder.
From what I've read, many of the gauges aren't real accurate as far as the numbers they return go but still useful for measuring the differences between the cylinders. With yours being so close I wouldn't worry about it.
Did you have the throttle held open when cranking? I just did a test on my inline 6 without opening the throttle and had low numbers like you, but all were within a percent or two of the others. I am calling it good for now. After my rebuild (not including pistons and rings) I will perform the test again with throttle open.
Do you have that cheap Actron gauge? I do and that may be an issue too.
Nutter thing..did you have the plugs in or out?. I did mine one at a time with all other plugs in and got consistant low readings. I plan to pull them all next time, with W/O throttle and see if I can get higher compressions.
You have to have all of the spark plugs removed and you have to pull the rope about 6 times per cylinder. If you do a decarb on the engine you may get a higher reading. I might pass on anything with readings under 100 psi.
