Hangar 9 Piper Pawnee 40 ARF - Manual (Page 46)

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 Step 4
Use the following images as a guide for cutting the
cowling for a 4-stroke engine. Make sure to make cutouts
for the rocker box covers, exhaust and needle valve. You
will need to drill a 3/8-inch (9.5mm) hole in the cowl for
mounting the fuel dot as well.
 Step 5
Use the following images as a guide for cutting the
cowling for a 2-stroke engine. Make sure to make cutouts
for glow plug access, muffler and needle valve. You will
need to drill a 3/8-inch (9.5mm) hole in the cowl for
mounting the fuel dot as well.
Note: We used a Dubro Exhaust
Deflector (DUB697) to allow the exhaust
to exit the rear opening in the cowl.
Section 10: Cowling and Canopy Installation