The 25 hp Johnson outboard runs a plug gap of .030 in.
advance auto sells a spark plug tester for around 25 dollars
The required plug gap for a 25 hp Johnson outboard is .030 in.
Spark Plug gap is .025
0.85
The correct spark plug gap for the 1994 model, 25 hp Evinrude outboard is .030 in.
its gaped at .25
.25
According to weedeater.com they are all to be .25..
25-.30
25 thousands of an inch
A champion RC12YC spark plug is 14mm thread diameter. The torque for this size is 18-22 foot-pounds (25 to 30Neuton·meters)