Harken FLY Series User manual

Part
No. Description
Sheave
Ø
Max sheet line Ø Max working load Breaking load Replacement
Lashing Line
mm in kg lb kg lb
2698 18 mm single 18 mm 5 3/16 125 275 450 992 HCP1438
2158 18 mm double 18 mm 5 3/16 204 450 680 1500 HCP1438
2161 18 mm single/narrow 18 mm 5 3/16 125 275 450 992 HCP1438
2171 29 mm single 29 mm 7 9/32 350 770 700 1540 Line not included
2173 40 mm single 40 mm 9 11/32 650 1435 1300 2870 Line not included
Specifications
Planning Installation
CAUTION! Avoid injury or damage to
equipment. Follow these precautions:
Terms
1. Lash only to objects with rounded edges.
Avoid sharp corners.
Rounded Sharp
3. The 18 mm blocks ship with lashing line. Use
two laps of supplied line to create four strands
to match the maximum working load of the
block.
2. Always lash to mouth of the block. Head is not strong enough to secure line.
Head Head
4. Blocks 2161, 2171, 2173: Use sailmaker's
twine or similar to secure lashing strands to head.
Blocks 2171, 2173: Use tubes at head to secure
lashing strands to head.
INSTRUCTIONS
FLY™BLOCK
WARNING! Strictly follow all instructions to avoid an accident, damage to your vessel,
personal injury or death. See www.harken.com/manuals for additional safety information.
USA –Tel: [phone] • Web: www.harken.com • Email: [email protected]
Italy –Tel: [phone] • Web: www.harken.it • Email: [email protected]
Bail
Head
Mouth
4 Lashing
Strands
2 Laps
Sheave

Tying Knots
Lashing at 90° – Block 90° to Bail
Run line through mouth, head, around bail, and back on the same side. Run line from mouth through
head, around bail, and back on the other side for a second lap. Secure with Carrick knot or other secure
knot. Consult knot tying book or see www.harken.com/knots.
See www.harken.com/knots. Alternatively, consult a good knot tying book or consult a rigger.
Lashing at 0° – Block and Bail In-line
Run line through mouth, through head, around bail, and down on other side. Repeat so there are two laps.
Tie ends using a Carrick knot or other secure knot. Photo is
not intended to teach this knot. Consult knot tying book or
see www.harken.com/knots.
Do not tie square knot
or “granny knot”.
These can loosen.
Lap on same side.
Blocks 2161, 2171, 2173: Use needle and
sailmaker’s twine or similar to secure lashing
strands to head.
Blocks 2161, 2171,
2173: Use
sailmaker’s twine
or similar to secure
lashing strands to
head.

Becket Options
Using Lashing Line as Becket
Starting through mouth, run line through head, around bail, through head, and through mouth. Loop line once
below block. Loop line a second time forming a becket. Run line through head, around bail, and through mouth.
Secure using Carrick knot or other secure knot. Consult knot tying book or see www.harken.com/knots.
Blocks 2161, 2171, 2173: Use sailmaker’s twine or similar to secure lashing strands to head.
Using Sheet as Lashing and Becket
Do not use HCP1438 line supplied with 18 mm Fly block. Use a larger, stronger line that exceeds the block's break-
ing load to account for loss of strength due to weakness of knots, UV damage or chafing. Run sheet through
mouth, head, around bail, and back through head. Leave tail below for tying or whipping to long section of line.
Run line back through mouth and secure to long section of line. Use bowline knot or whip lines together.
Blocks 2161, 2171, 2173: Use sailmaker’s twine or similar to secure lashing strands to head.
Securing Sheet Directly to Mouth as Becket
Pass sheet through mouth and secure with
bowline, splice, or whip line to itself. Consult
knot tying book or see www.harken.com/knots.
Sheet
line
Becket
Lashing line used as becket - rigged with
sheet.

Warranty
For additional safety, maintenance and warranty information see www.harken.com/manuals or the Harken catalog.
Maintenance
5266W 10/18
Securing Block to End of Larger Line
Do not use supplied HCP1438 line. Use a larger, stronger line that exceeds the block's breaking load to account
for loss of strength due to weakness of knots, UV damage or chafing. Run line through head, through mouth,
and out head.Secure with a bowline with end whipped to loop so it stays secure. Consult knot tying book or
see www.harken.com/knots.
Securing Block to End of Larger Line
Securing Block to Large Diameter Object
When running line around large-diameter object such as a boom, cross line each time you pass around the object.
Blocks 2161, 2171, 2173: Use sailmaker’s twine or similar to secure lashing strands to head. Use sailmaker's twine or
similar to hold lashing strands crossed as shown below.
Important! If lashing line is pushing outwards on head, it can break the block. Check to make sure each lap
crosses separately as shown in the photo at left below.
Harken equipment is designed for minimal maintenance. However, some upkeep is required to give the best
service and comply with the Harken limited warranty.
Keep your equipment clean and free-running by frequently flushing with fresh water. Periodically clean with
mild detergent and water solution. Spin sheaves to distribute soap solution evenly.
Flush with fresh water.
IMPORTANT! Exposure to some teak cleaners and other caustic solutions can result in discoloration of part
and is not covered under the Harken warranty.
Inspect Line Every Time You Sail
Inspect lashing line for chafe or UV damage every time you sail. Replace damaged
line immediately. Replace line with no visible damage every two-years. Use Harken
replacement line, but if using own line, see “Using Alternate Line, Knots and Splices”
and chart on back page for important information to help you select the correct line.
2161, 2171, 2173