Bombardier SeaDoo 1998 factory shop manual, Page 128Get 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 04-06INSPECTION ON WATERCRAFT
Remove carburetor(s)Refer to CARBURETOR 06-04
F01D53A