think that may end up my next trick bruce. someon has tried to crush seal a piece of tube in there but it isn't working. is it also the vent for the tank and and what methods are recommended to plug it off please? .
You might lose it one day, do it up properly, it vents through the hole in the top face via the hole in the inside plate.My oil tank cap has 2 closed positions. One is twisted past the first detent of the bayonet type fitting. The second is twisted further to the right. I leave mine in the 1st position, which I believe provides venting.