Just got a new 5088 and like it very much, but that thing goes slow down the road. About 18.5 mph is all she will go. It has a 2 speed hydro so I thought I would just flip that whisker switch and be able to go 25 mph, but when you engage the 2 speed hydro the revs drop to 1750. Whats up with that. Even in the field, unless the seperator is running when you press the button the engine revs down, Is this normal? Is there any way to bypass that? Thanks.