Valves, Checking; Valve Springs, Checking - Husqvarna FC 250 2018 Repair Manual

17 ENGINE
17.4.21
17.4.22
210
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300117-10

valves, checking

310437-10
302809-10

valve springs, checking

310438-10
Remove the valve spring retainer and valve springs.
Mark the valve springs according to their normal built-in posi­
tion.
Pull the valve down out of the valve guide.
Remove valve stem seal
I Valve stem seals plier (77229010000)
Remove valve spring seat
Mark the valves corresponding to their installation position.
Info
Place the valves in a carton corresponding to their
installation position and label them.
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Check the valve plate for run-out.
Valve - run-out
At the valve plate
If the measured value does not meet specifications:
Change the valve.
-
Check sealing seat on valve for damage and wear.
f)
If the sealing surface is damaged or worn:
Machine the valve seat.
-
Check the valve springs for breakage and wear (visual
check).
If the valve spring is broken or worn:
Change the valve spring.
Measure the length of the valve springs.
Valve spring
Minimum length, outer
intake valve
8
with the special tool.
(a p. 309)
0.
� 0.05 mm (� 0.002 in)
42.40 mm (1.6693 in)
1
..