Fuel Lines

[tsubaki]

There are always primeing issues when replacing a filter.
When adding the new one, fill the filter with fuel then screw in place and then try to remove all the air that will be trapped.
This is easily done with an outboard using a primer bubble. An inboard may require some additional thought.
One suggestion might be use the remaining port as a priming outlet by having a bubble and hose connected to it with the end of the hose plugged when unused. When priming is required simply remove the cap and pump the bubble till fuel flows out. I'm sure this is not the normal way it's done with inboards but it will prevent tampering with the line going to the fuel pump.
Some of the guys with inboards would be better at suggesting the priming aspects than me.