1977-2000 Suzuki DT5/6/8 Outboards Service Manual, Page 84Get this manual
GfAR CASf (10) Set the pump plate gasket in place and tighten bolt tentatively, making it fingertight
(13) Adjust the gears as follows: Adjust the forward gear in such way that the tooth contact pattern produced rolling this gear against pinion gear will extend from the center of the tooth toward the toeThis is accomplised increasing decreasing the shim thickness
(11) Insert pump impeller key into drive shaft, and set the impeller in place