My 125 dies when I put it into a forward or reverse gear, acts like it's in a bind or a tow rope is wrapped up around the prop. I've checked the lower unit from top to bottom nothing seems to be wrong it all looks new inside. If I slam it into gear past the point of an idle to a higher RPM I can get the boat in motion and runs great. The motor starts & idles great. Is there anything else Im overlooking here?