Harken FLY, FLY 2698, FLY 2158, FLY 2171, FLY 2173 Instructions Manual

INSTRUCTIONS

FLY™ BLOCK

USA – Tel: [phone] • Web: www.harken.com • Email: [e-mail]

Italy – Tel: [phone] • Web: www.harken.it • Email: [e-mail]

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.

Specifications

Part

No. Description

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

Sheave

Terms

Bail

2 Laps

Head

Max sheet line Ø Max working load Breaking load

mm in kg lb kg lb

Ø

Planning Installation

CAUTION! Avoid injury or damage to
equipment. Follow these precautions:

4 Lashing
Strands

Sheave

1. Lash only to objects with rounded edges.
Avoid sharp corners.

Replacement
Lashing Line

Mouth

Rounded Sharp

2. Always lash to mouth of the block. Head is not strong enough to secure line.

Head

Head

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.

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.

Tying 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.

Blocks 2161, 2171, 2173: Use needle and

sailmaker’s twine or similar to secure lashing
strands to head.

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.

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.

Blocks 2161, 2171,
2173: Use

sailmaker’s twine
or similar to secure
lashing strands to
head.

Lap on same side.

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.

Sheet

line

Becket

Lashing line used as becket - rigged with
sheet.

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 break­ing 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.

Securing Block to End of Larger Line

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 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.

2161, 2171, 2173

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.

Maintenance

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.

Warranty

For additional safety, maintenance and warranty information see www.harken.com/manuals or the Harken catalog.

5266W 10/18