Have 1977 mercury 9.8 thunderbolt,no spark,going to replace points first,how do i check stator and the 2 coils

To check your stator and coils you need an ohms meter.You will also need to get the proper values from a manual to be sure if they are within spec's.If you no spark on both cylinders it is not a points problem.The usual cause of this is a bad stator.Hope this helps you and good luck.