SB, 335XPT, Carburettor, 1999-02
In order to ensure correct operation of the choke the choke shaft has been modified so that
the valve is locked in the closed position by a ball and spring. The choke rod has also been
modified for the new shaft, and in order to facilitate identification it is now white instead of
black.
NOTE! The original Walbro 459 B carburettor assembly can be replaced with the NEW
Walbro WT 532 carburettor without any further modification, but the NEW choke rod must
also be fitted.
Old Walbro 459 B carburettors can be converted to the new specification as detailed below.
Walbro 459 B carburettors that have already been converted to the new specification may be
found on production saws from serial number 850 0001 onwards. These can easily be
identified by checking whether the spring-loaded ball is countersunk. See diagram A!
New ref. no. Description Excl. ref. no. Remarks
503 28 15-18 Carburettor Walbro WT532 503 28 15-11
503 82 27-02 Choke rod 503 82 27-01
537 04 39-01 Choke shaft 503 91 44-01 *
501 46 85-01 Ball
501 46 84-01 Spring
Clip 503 91 36-01 *
* still available as spare part
Introduced from serial number: 8500001