I have a 1984 1 cyl 4.5 Merc serial # 6501395 and when I was testing the new coil before installing it the primary output range is .2 - 1.0 OHMS and the new one is .4...so that's fine...but the secondary output range is 800-1100 OHMS....that reads 0. which is exactly what the one I took off...