19
MOUNT THE COWL
❏ ❏ 1. Take a few minutes to study how the cowl
is mounted in the following photos. The cowl is
mounted via a cowl ring which is permanently glued
in the cowl. The cowl ring is attached to removable
cowl mounting tabs with 4-40 x 1/2" SHCS—three
of the cowl mounting screws are accessible from
behind the cowl and the fourth one on the top of the
cowl is accessible through the front. (Otherwise, the
carburetor intake would have to be removed just to
remove the cowl.) Each cowl mounting tab is attached
to the fi rewall with two 4-40 x 3/8" [9.5mm] Phillips
screws and blind nuts. The cowl mounting tabs are
removable so that the fi berglass nacelle cover can be
removed to access components in the nacelle.
❏ ❏ 2. Disconnect the retract door pushrods and remove
the nacelle cover from the left, inboard wing panel.
❏ ❏ 3. Drill 5/32" [4mm] holes through the fi rewall
at the eight precut marks for the cowl mounting tabs.
IMPORTANT!: Use care NOT to drill into the fuel tank
when drilling through the bottom two holes!
❏ ❏ 4. Use a 4-40 x 3/8" [9.5mm] Phillips screw and
two #4 washers to pull 4-40 blind nuts into the back of
each hole just drilled in the fi rewall. Use epoxy to glue
in the blind nuts as they go in or use a few drops of
thin or medium CA to glue in the blind nuts after they
are all the way in.
❏ ❏ 5. Note that there are two different plywood
cowl mounting tabs—long ones (“A”) and short
ones (“B”). One of the longer, “A” tabs has a larger
hole in the top. Press a 4-40 blind nut into the larger
hole of that “A” tab.
❏ ❏ 6. Mount the nacelle cover to the wing panel.
Use two 4-40 x 3/8" [9.5mm] Phillips screws, #4 lock
washers and fl at washers to mount each cowl mounting
tab to the front of the fi rewall—the short “B” tabs go on
the sides of the fi rewall and the long “A” tabs go on the
top and bottom of the fi rewall. The “A” tab with the blind
nut goes on top of the wing and the blind nut goes
toward the back. Note: Do not tighten the screws all
the way so the tabs will be allowed to “fl oat.”
❏ ❏ 7. Mount three more 4-40 blind nuts into the
three large holes in one side of one of the cowl
rings and glue them in—note that one of the holes
is smaller than the other three—do not mount a blind
nut into that small hole.
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