Echo PB-251 Service Manual page 37

PB-251
5-11 Replacing carburetor (continued)
(G)
(K)
(L)
(G)
(F)
(G)
FUEL SYSTEM
5. Use 10mm spanner (F) and remove throttle
(H)
bracket (G) and nut (H) from old carburator.
6. Install nut (H) into boss (I) of new carburetor (J).
(I)
7. Apply thread locking sealant (Loctite #242,
ThreeBond 1324 or equivarent) on threads (K, L) of
throttle bracket (G).
(J)
NOTE: Throttle bracket has two different threads.
(K) is M7 thread for plastick boss (I). (L) is M6 thread
for nut (H).
8. Screw in throttle bracket (G) into boss of carbu-
retor with 10mm spanner. Screw in until distance
(M)
(M) becomes 2.4mm (0.1 inch).
(G)
9. Make sure groove (N) of throttle bracket (G) is
pointing the corner (O) of carburetor body. If not,
(N)
adjust throttle bracket direction according to the fol-
lowing instruction.
(O)
10. If groove of throttle bracket doesn't reach the
corner of carburetor, screw in throttle bracket clock-
wise and align groove to the corner of carbretor.
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