.020"
.035 spark .020 points
.020 or 30 degrees of dwell if you have a meter
the plug gap is .028 to .033 the point gap is.020
The points gap on a Merc 40 4hp is .020
20 thousandths,.020 on a feeler gauge.
The maker points on a 9.8 hp Mercury outboard should be set to .020 in.
Spark plug gap is .030 thousandths on all their engines and if it's old enough to have points, .020 thousandths for all models.
The ignition points on the 1976 model, 25 hp Johnson, are set to .020 in.
Spark plug gap is .020 [or 0.5mm metric] Bosch plug numbers are 7547 and WSR6F [either can be used] Can be converted to Champion or NGK, etc. with an online conversion chart. T'care, Mike
Usually the gap should be from .020"-.024"
points .020 spark plugs .035. and Dodge did not have a v6 then only a slant 6