AeroWorks 75cc YAK-54 ARF-QB Assembly Manual page 44

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17.
Re-install the engine carburetor behind the
firewall as shown and secure in place.
18.
Typical rear carburetor engine installation with
carburetor behind firewall.
Note: It may be necessary to cut a slot or drill
holes in the engine box floor to allow adjust-
ment of the carburetor high and low needle
screws.
19. 3W-75i rear carburetor engine with Pitts style
muffler installed.
Note: there is no requirement to modify the engine
box for muffler clearance.
20. ZDZ-80 super rear carburetor shown installed.
The length of your engine will determine the
number of spacers needed to give the correct
distance between the firewall and engine prop
hub.
The correct distance is 7" to 7 1/4".
44

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