Encumbered by a lack of Encumbrance Rules

I like my game rules light. The less rules the better in my view and the less time spent trawling back and forth through the rules trying to find the exact paragraph you need should mean more time spent adventuring. I accept that it doesn’t always work out that way and without ‘enough’ rules you can end up with not knowing what should happen or what is ‘right’. And so on to encumbrance!