Tips for getting fuel filter cap off?

[procta]

I recommend changing the whole housing and filter otherwise you usually dislodge some dirt and end up with it further down the line and then it will have problems.
But if you are going to take the lid off anyway then a big spanner with somebody twisting the lid at the same time whilst making sure they aren't pushing on the pipes because they snap off very easily.

agreed, the 1st time I did a fuel filter change I ended up snapping the fuel lines on the lid!  so I decided from now on just to swop the full housing over. I sometimes sell my old ones on the forums.