1981 merc 80. losing 2 cylinders intermittantly

[seacucker]

Hello everyone. 80 hp merc idles great but when i drop the hammer seems like 2 cyls are cutting in and out? any ideas?

 

[Laddies]

Re: 1981 merc 80. losing 2 cylinders intermittantly

Check the trigger wires for a short or open when moving the spark advance