Mercury 150 hp EFI 1998
(Barnesville Gav )
Motor seams to be missing by on cylinders 2,4,6.
If you pull the spark plug wire on either of these three cylinders it doesn’t affect the running
Pull cylinder 1,3,5 and he motor runs horribly and cuts off.
What could make 2-4-6 misfire or stop firing all at once.
Just asking before I innvest in 6 new coils and not fix he problem