Cylinder; Piston - Husqvarna TE 250 - 310 2011 I.E. Workshop Manual

ENGINE OVERHAUL

Cylinder

Check the walls for dents or scuffing. Measure cylinder bore diameter at three
different positions. Measure each diameter in two directions at right angles to
each other to determine taper and out-of-round.
Max. taper (wear limit): 0.05 mm.
Max. out-of-round (wear limit): 0.05 mm.
If cylinder is worn beyond these limits, replace both cylinder and piston. The liner
undergoes a special hardening treatment and cannot be ground.

Piston

Clean off any carbon deposits from piston crown and grooves. Perform a careful
visual inspection of the piston and check its dimensions. There should be no
signs of forcing, scuffing, cracking or other damage.
Ed. 07-2010 G.11