Evinrude put out 2 Service Bulletins between 1949-1953 pertaining to the 4425 Sportsman. Evinrude Service Bulletin Number 53 concerned incorrect polarity of the magnet rotor in the magneto. Evinrude Service Bulletin Number 113 concerned an improved reed for the carb. If anyone has these 2 bulletins, I’d like to know what exactly they said.
The 4425 used spark plug Champion J6J or Autolite A3X gapped at .030"
Points gap is .020"
The float should extend above the float bowl rim by 1/32" when the bowl is full of fuel.
Condenser rating was .2 mfd.
Flywheel nut torque is 25 ft lb.
Note the screen in the carb bowl where the inlet elbow screws in.
Low speed needle is normally 3/4 turn out from closed.
The attached lower unit picture shows the sequence of disassembly numerically. Begin with screw number 1 per the instructions,(only if you must).
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