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  1. R

    Switch box problem

    I have a 1981 80 hp Mercury: last season i replaced the switch box due to no spark in #4 cylinder. I only used the motor a few times and stored it away for the winter. While preparing it for the season this year, I again have a miss due to no spark in #4. I have done all the trouble shooting as...
  2. R

    80hp mercury rough idle and stalling

    getting boat ready for season motor starts but has rough idle has a miss ,coughs and stalls at idle ;as it warms up doesn't stall as much but still coughs and misses, spark seems the same in all 4 cylinders any ideas would be appreciated
  3. R

    1981 mercury 80hp no spark

    I am new to site and need ideas as to 1981 mercury 80 hp no spark #4 cyl. I swapped coils #3 and #4 still no spark #4 but #3 had spark this tells me coils are good ; could this mean switch box is bad or are there other tests to narrow down problem. Also if I buy a used switch box is there any...
  4. R

    no spark

    have 1981 80hp mercury with no spark #4 cyl swapped coil #3 and#4 STILL NO SPARK #4 but had spark #3 this tells me coils are good so I assume switch box is the problem or could it be something else.
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