Stihl MS 291 - Ignition System Service; Ignition Timing Information; Preseparator Procedures; New Ignition Module Installation

44 MS 271 C, MS 291 C
6.8 Piston Rings
– Remove the piston, b
6.7
– Remove the piston rings from the
piston.
: Use a piece of old piston ring to
scrape the grooves (arrows)
clean.
: Position the new piston rings so
that the radii face
upward (arrows).
5902RA160 TG5902RA161 TG
– Carefully fit the piston rings over
the piston
– they might otherwise break.
: Install the piston rings so that the
radii at the ring gap meet at the
fixing pins in the piston
grooves (arrows).
: Check correct installed position
of the piston rings (arrows).
– Install the piston, b
6.7
– Reassemble all other parts in the
reverse sequence.
5902RA162 TG