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i have 3 cylinder 1972 mercury 650 with cdi. I am not getting spark at the cylinder but if i move the same wire to the other 2 spark plugs i do. Its the same on all 3 wires. Why would it not spark on plug its suppose to fire?
perform spark test one by one with spark plugs off to the cylinder insert it to their designated ignition coil and ground it to the engine block
perform spark test one by one with spark plugs off to the cylinder insert it to their designated ignition coil and ground it to the engine block
The plugs spark to themselves across that circular gap. I suspect you have a water leak into the top cylinder. Seen that before.
Jeff
i have 3 cylinder 1972 mercury 650 with cdi. I am not getting spark at the cylinder but if i move the same wire to the other 2 spark plugs i do. Its the same on all 3 wires. Why would it not spark on plug its suppose to fire?
I would have to ask are you sure your wires aren't mixed up.Even though in my mind they should spark on all 3 regardless.
I quadruple checked wires, distributor belt alignment and all wire connections. It makes no sense at all.