Getting ready to go boating (!), and on changing gearbox oil realise that a Parsons F Type reverse gear in book should take 2.25 pints, but dip stick level is way lower than this. Before draining, the level was mid way between high and low on the stick, but there was only 0.5 pint in it, which seems worryingly low to me. My dip stick is stamped F Type, and I have a spare which is the same if not marked slightly lower. I would guess with oil up to the upper level on the stick there would be no more than 1 pint in the box. On neither gearbox or in the Parsons drawing is there a collar which would hold the dip stick up any higher than it goes.
So, oil capacity to the book, or to the mark, or between the two maybe?
Thanks!