Evinrude runs rough at low speed

[sun490]

i have an old 60hp evinrude i

i have an old 60hp evinrude i think around 1970 model selectric. was running fine a week ago & now it wont idle properly & runs rough until i boot it. once i am at hire rev range runs fine.
cheers shane

 

[joereeves]

"What are the compression read

"What are the compression readings of all cylinders? With the spark plugs removed, the spark should jump a 1/4" gap on that model with a strong blue lightning like flame. Does it?

Have you tried new spark plugs, and if so, what are they?"