Harken 948 MKIII Jib Reefing & Furling - Manual (Page 23)

Preassembly
Foil Length Instructions
March 2001 Unit 2.5 MKIII 12
All Installations
■ Roughing up Top Foil for Trim Cap
Rough up the top 1" (25 mm) of the top foil with
a file or sandpaper.
Most Installations
■ Deburr the Foil
After cutting foil, clean all shavings from inside the foil.
Failure to deburr or clean the inside of the foil may
cause it to seize to a connector when it is being
installed.
Some Installations
■ Cutting and Drilling Bottom Foil
Consult the chart on page 13 to see if you need to short-
en the special bottom foil. If you do use a hacksaw to
shorten the special bottom foil by 6 1 /
2
" (165 mm). Make
sure you cut the end nearest the existing holes. Deburr
the foil after cutting.
Tip: there are three dimples in the bottom foil. The upper dimple is a
guide for cutting the foil. Wrap tape evenly around the foil so the top
edge of the tape runs through the center of the upper dimple. Line the
hacksaw blade up with this edge of the tape. The side of the blade
facing the lower part of the foil should run through the center of the
dimple.
Drill two holes using a 21 /
64
" (8 mm) drill bit. Use the dim-
ples in the foil as a guide. The center of the dimples will
be at 3 1 /
4
" and 4 1 /
4
" (82.5 mm and 108 mm) from the cut
end of the foil.
WARNING
If you make any cuts in the foils be sure to carefully
clean all shavings from inside the foils. Failure to deburr or
clean the inside of the foils may cause them to seize to the
connector during installation.
■ Adjusting Foil Length
The length of the furling system is matched to the headstay length by adjusting the
number of 7' (2.13 m) foil extrusions used and by cutting the top foil to length from
one of the 7' (2.13 m) foils provided. In some cases the bottom foil is also shortened.
Consult the chart on page 11 to determine how many full length 7' (2.13 m) foils
you need and save these. You should have an additional 7' (2.13 m) foil to be used
for the top foil which will be 7' (2.13 m) or less.
■ Foil Length - Read Before Cutting Foil
The foil charts on pages 13 and 14 are based upon the top foil riding over the
shank of a swage eye so it is 2 1 /
2
" (63.5 mm) to the center of the eye. On some boats
this is not possible–for example–a Norseman, Sta-Lok or Rod upper terminal. If
for any reason your top foil cannot ride within 2 1 /
2
" (63.5 mm) of the pin center,
shorten the foil length to compensate. This pin center is the upper measure-
ment point of the pin-to-pin length as described on page 8.
2 1 /
2
"
63.5 mm
X
Swage
Shorten foil
by “X” amount
■ Find Your Pin-to-Pin Headstay Length on Page 13 or
14 and follow procedures below as necessary.
Pin-to-pin length is described on page 8.