One of our 2004 Ultra has spray problems now (just started). It sprays, but only when rev'd up to full throttle (if I slow down, the spray quits completely). The same time this ocurred, the electric start quit working altogether. I used to be able to just turn on the switch (without the unit started) and the pump would work. Not now. This unit has very low hours, and it's in excellent condition. What's up? Thanks in advance. Please help.