I still can't figure out why the edelbrock marine carbs don't have at least a PCV vacuum port. I would think marine engines would especially want a pcv installed. The air cutouts are all there! Here is how to fix the problem easy as 1 2 3!
1. With a 1/4" bit, drill from the bottom upwards until you intersect the perpendicular existing hole. There is a 1/4" existing indentation to place your bit so you don't have to guess.
2. Use a 21/64" bit or if you don't have one 5/16" will work. Drill from the front inwards to make the hole uniform until your bit bottoms out, use a light hand.
3. Thread the hole with a 1/8"NPT tap. Then screw in a 1/8"NPT to 3/8" hose barb fitting and you're done!
1. With a 1/4" bit, drill from the bottom upwards until you intersect the perpendicular existing hole. There is a 1/4" existing indentation to place your bit so you don't have to guess.
2. Use a 21/64" bit or if you don't have one 5/16" will work. Drill from the front inwards to make the hole uniform until your bit bottoms out, use a light hand.
3. Thread the hole with a 1/8"NPT tap. Then screw in a 1/8"NPT to 3/8" hose barb fitting and you're done!