Replaced the boot, which meant I had to remove the outdrive. Afterwards I now find the shift into forward and reverse has changed. Now the RPMs increase a lot before the shift takes place, making a large "lurch" into gear. I checked the points (on the shift control on the engine) at which the outdrive comes out of forward and reverse, it's supposed to be about an inch between them, according to the book. I have over two inches. What's going on?