I’ve tried two diff types nether pass water like the fitting is blocked on the outboard, there’s a valve fixture in the outboard fitting, tried air pressure which pressurized the motor and air escaped the fitting if the plugger valve was displaced in the fixture …. Very weird
It’s a new motor 25 HP tried muffs then tried a big tub inlet well under water still no tell tail, I’m thinking might have to buy a owners manual to know more about the flushing port ( new modern gear kinda worried might flood the cylinders )
On the ocean it has tell tail indication