General; Inspection (Assembled Engine); Disassembly - Rotax 2005 717 RFI Engine Shop Manual

GENERAL

The clearance of rotary valve cover or rotary valve
shaft gear backlash can be performed without tak-
ing apart engine.
However engine must be disassembled to work
on rotary valve shaft/components.
INSPECTION (ASSEMBLED
ENGINE)
Rotary Valve/Cover Clearance
Remove air intake silencer and carburetor. Refer
to appropriate VEHICLE SHOP MANUAL.
Refer to table below to find dimension specifica-
tions. For measurement procedures, refer to EN-
GINE MEASUREMENT section.
ENGINE
MEASUREMENT
Rotary valve/cover
clearance
NOTE: If the rotary valve/cover clearance is too
small, this could create an overheating situation
and if the clearance is too high, this could create a
hard starting situation.
Rotary Valve Shaft Gear Backlash
Verify rotary valve shaft gear backlash as follows:
Remove PTO flywheel guard.
Remove spark plugs, rotary valve cover and valve.
Manually feel backlash at one position, then turn
crankshaft about 1/8 turn and recheck. Continue
this way to complete one revolution.
Backlash must be even at all positions. Otherwise
overhaul engine to find which part is faulty (gear,
rotary valve shaft or crankshaft with excessive de-
flection).

DISASSEMBLY

Rotary Valve Cover
Remove air intake silencer. Refer to appropriate
VEHICLE SHOP MANUAL.
Unscrew 4 retaining screws no. 2 and withdraw
rotary valve cover no. 1 and rotary valve no. 13.
smr2005-079
TOLERANCES
NEW PARTS
(min.) (max.)
0.25 mm 0.3 mm
(.010 in) (.014 in)
www.SeaDooManuals.net
Section 02 717 ENGINE
Subsection 05 (ROTARY VALVE)
Rotary Valve Shaft
To remove the rotary valve shaft assembly, the
engine must be removed from watercraft (refer to
appropriate VEHICLE SHOP MANUAL).
Open bottom end and remove crankshaft (refer to
BOTTOM END section).
First remove rotary valve cover and valve then re-
move snap ring no. 4 from crankcase.
F01D22A
1. Removing snap ring
To remove rotary valve shaft assembly, use the
puller (P/N 420 876 488).
F01D23B
Place puller over rotary valve shaft end and screw
on puller bolt into shaft. While retaining bolt with
a wrench, turn puller nut CLOCKWISE until shaft
comes out.
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