Hi. Well finally found time to do a comp test. Found it bit difficult to get a seal (rubber bung/push in type, maybe rubber hard, as a vintage one) though managed it with the dry test. All 6 cylinders between 190 and 200.
Second test with throttle closed showed a difference of 0, or + / - 1 difference from first readings (I guess they should all have been -, as less air)?.
Wet test not accurate, as could't get the gauge to seal properly and my helper tan out of time. 1 and 2 cylinders/230 and 220 higher. Did try no 6 ( the one that's running weak, showed 5 higher, but this test was leaking worse and ran out of time at this point.
So, not sure what to make of that, except looks like losing comp from the cylinders/pistons on at least some of them.
Cheers, Dave