was just out in the lake,was going ok then gear box neutralised,no forward or reverse,lift leg up put in forward can turn prop clockwise,cannot turn anticlockwise,turns both ways in rev,engine got hot reached 200f fresh water cooled,now when put in forward engine stalls,but ok in reverse,water pump replace at marina,recently,what could have gone wrong,no oil?cannot slip till after newyear us aussies have 2weeks off over christmas,no smell from coupling housing like failed coupling,any idears, thanks