Now loosen the carburetor mounting clamps and refit the carburetors to the engine. The
pictures below show how they look before being modified.
Remove the throttle control lever from the throttle shaft and remove the support bracket
from the top of the carburetor. The brass bowden cable mounting fitting for the throttle
cable has to be removed from the support bracket and screwed into the carburetor,
pointing down toward the throttle lever. The curved bowden cable tube that routes the
choke cable to the choke lever needs to be loosened and rotated to point forward, angled
to pass to the side of the throttle bowden fitting.
The choke shaft has a dimple engraved at the end. When mounting the brackets on the
shaft make sure the dimple is facing downwards.
Open up the large hole in the end of the throttle stop lever to 7 mm, and then the allen
screw, brass sleeve, brass washer and nut on the end of the original throttle control lever
are removed from that lever and remounted in the 7 mm hole on the throttle stop lever.
For the Sinus installation, the throttle cable is connected to this screw/sleeve/washer
assembly and moves the throttle shaft via the throttle stop lever, rather than the original
throttle control lever.
The throttle return spring that was disconnected from the throttle control lever is now
connected to the throttle stop lever. Note that this revised return spring connection
causes the spring pressure to hold the throttle at the fully closed position, rather than the
fully open position that is standard for the Rotax. Thus the Sinus throttle cable pulls the
throttle open against the return spring tension. In the standard Rotax throttle operation.
the throttle cable pulls the throttle closed against the return spring tension.
http://www.pipistrel.si © Pipistrel Release March 2009 © Page 152 of 267
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