hi i have a 06 s175 and it has been doing something odd for a few months now, mind you i use it maybe once a week but heres what happens. i will fire it up work it moving dirt with the bucket ect then after 10-20 minutes it will sputter/bog down/almost and stall if i push the levers to hard wether it be lifting lowering tiling the bucket or going back or forth. it does not matter the pisition of the throttle wether it be at max rpm or at idle as soon as i do anything move/lift lower or tilt it will bog down and go to stall. fuel filter has been changed no affect, cleaned out fuel lines no affect, it is always topped with hyd fluid. any ideas??? please help