Ok,
I have another question about this SD-20, regarding the cooling system. I understand the pressure-vacuum system in theory, but am wondering what this particular hole on the left side of the motor is. It is down low on the powerhead.
When I blow air through one of the water tubes in the leg, air exits this hole in the picture. Is this some sort of discharge hole? Something missing?
Thanks for looking.
Sorry about the orientation, but I couldn’t get it rotated 90 degrees clockwise as it should be.