Bombardier SeaDoo 1999 factory shop manual, Page 144Get this manual
Section 04 ENGINE Subsection 07 (ROTARY VALVE)
GENERAL
The following verification procedures such as clearance of rotary valve cover or rotary valve shaft gear backlash can be performed without removing engine from watercraftHowever engine must be removed from watercraft to work on rotary valve shaftcomponentsRefer to REMOVAL AND INSTALLATION 04-03 for engine removal procedureBottom end must be opened to remove rotary valve shaftRefer to BOTTOM END 04-06
F01D53A
145 feeler gauge