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Full boat

J/70 side-view illustration showing the mast, mainsail, jib, standing rigging, boom, rudder, lifting keel and bowsprit.
J/70 · Illustrated guideEnlarge diagram

Illustration based on the supplied J/70 plan and J/Boats specifications. Spinnaker not shown in this view. Illustrations are a location guide; installed arrangements may vary.

Rig details

J/70 lower-rig side illustration showing boom attachments, mainsheet, vang, mast-base fittings, backstay, jib furling connection and bowsprit. Select a numbered point to browse the related parts.

Scroll sideways to explore the numbered points, or choose a part below.

J/70 · Illustrated guideEnlarge diagram

Illustration based on the supplied J/70 plan and J/Boats specifications. Upper mast and sails are cropped to make the lower rig easier to identify. Illustrations are a location guide; installed arrangements may vary.

Cockpit details

J/70 cockpit illustration adapted from the supplied Harken reference. Select a numbered point or part name to browse options.

Scroll sideways to explore the numbered points, or choose a part below.

J/70 · Illustrated guideEnlarge diagram

Illustration adapted from the Harken J/70 layout. Repeated fittings share a selector; selecting it highlights their locations. Illustrations are a location guide; installed arrangements may vary.

Deck details

J/70 overhead deck illustration showing traveler, tiller, winches, sail tracks, hatches and deck fittings. Paired fittings share a selector.

Scroll sideways to explore the numbered points, or choose a part below.

J/70 · Illustrated guideEnlarge diagram

Illustration based on the supplied J/70 plan and J/Boats specifications. Repeated fittings share a selector; selecting it highlights their locations. Illustrations are a location guide; installed arrangements may vary.

Part 2 · Know your J/70

Mainsail

The mainsail is set behind the mast. Its controls include the mainsheet, vang, Cunningham and outhaul.

View catalog example

Part 3 · Know your J/70

Jib

The jib is set forward of the mast. Match the sail, luff attachment and furling arrangement to the boat.

Explore Jib

Part 4 · Know your J/70

Standing rigging

Stays and shrouds support the mast. Match lengths, wire diameter, terminals and attachment points.

View J/70 standing rigging

Part 5 · Know your J/70

Boom

The carbon boom carries the mainsail foot and its control attachments. Check the spar version and fitting dimensions.

Explore Boom

Part 6 · Know your J/70

Rudder & tiller

The transom-mounted rudder steers the boat through the tiller and extension. Match the pins, gudgeons and tiller connection.

View J/70 deck & rudder hardware

Part 7 · Know your J/70

Lifting keel

The ballasted keel lifts vertically for launching and transport. Match the lifting and locking hardware to the keel installation.

Explore Lifting keel

Part 8 · Know your J/70

Retractable bowsprit

The bowsprit projects from the bow to carry the asymmetric spinnaker tack. Check the tube, end fitting, housing and seals.

Explore Retractable bowsprit

Part 9 · Know your J/70

Boom-mounted mainsheet block

The block suspended from the boom forms the upper end of the mainsheet purchase. Match the sheaves, attachment and working load.

View mainsheet blocks

Part 10 · Know your J/70

Mainsheet & traveler

The lower mainsheet tackle connects to the traveler across the cockpit. Check the complete purchase and car attachment.

View J/70 mainsheet & traveler

Part 11 · Know your J/70

Boom vang

The diagonal vang system connects the boom to the lower mast. It controls boom lift; match the tackle and attachment fittings.

View J/70 vang & Cunningham parts

Part 12 · Know your J/70

Gooseneck & boom attachment

The gooseneck joins the boom to the mast. Confirm the spar maker, pin dimensions and bracket version before ordering.

Explore Gooseneck & boom attachment

Part 13 · Know your J/70

Cunningham

The Cunningham pulls down near the mainsail tack to adjust luff tension. Trace the installed tackle and check its fittings and line lead.

View J/70 vang & Cunningham parts

Part 14 · Know your J/70

Mast-base lead fittings

Lead fittings at the mast foot guide halyards and controls. Check the attachment and route of the line being replaced.

View J/70 mast-base fittings

Part 15 · Know your J/70

Shroud terminals & chainplates

The shroud ends connect the standing rigging to the boat structure. Match wire length, terminal type and adjustment range.

View J/70 standing rigging

Part 16 · Know your J/70

Backstay tackle

The backstay cascade and lower controls adjust rig tension. Match the purchase, attachments and block ratings as a system.

View J/70 backstay parts

Part 17 · Know your J/70

Jib furling connection

The forestay and jib meet the furling installation at the bow. The mechanism is below deck; check the swivel and end connections.

View J/70 furling parts

Part 18 · Know your J/70

Bowsprit & tack fitting

The extended bowsprit places the spinnaker tack ahead of the bow. Match the end fitting, tube, seals and housing.

Explore Bowsprit & tack fitting

Part 19 · Know your J/70

Lower mainsheet block

This block forms the lower part of the mainsheet purchase. Match the sheave arrangement, load and traveler attachment.

View fiddle blocks

Part 20 · Know your J/70

Traveler car

The car moves the mainsheet attachment across the cockpit. The car and track must have matching profiles and ratings.

View traveler cars

Part 21 · Know your J/70

Mainsheet swivel base

The swivel base presents the mainsheet cleat toward the helm. Compare the mounting pattern, lead height and block connection.

View swivel bases

Part 22 · Know your J/70

Traveler control cleats

These cleats hold the traveler control lines. Check the line diameter, lead angle and mounting centers.

View cam cleats

Part 23 · Know your J/70

Aft sheet turning blocks

The aft blocks turn the spinnaker sheets toward the cockpit. Check the attachment, sheave size and working load.

View soft-attach blocks

Part 24 · Know your J/70

Side-deck sheet blocks

These blocks guide loaded sheets along the side deck. Compare ratchet direction, sheave size, mounting and working load.

View ratchet blocks

Part 25 · Know your J/70

Primary winches

The primary winches help trim loaded sheets. Compare gearing, drum size and mounting dimensions.

View standard winches

Part 26 · Know your J/70

Cabin-top control cleats

The cabin-side cleats secure sail controls. Trace each line on your boat before replacing its cleat or fairlead.

View cam cleats

Part 27 · Know your J/70

Jib lead & sheet control

The jib lead and nearby control fittings set the sheet direction. Match the track, car, lead block and cleat arrangement.

View J/70 jib handling

Part 28 · Know your J/70

Backstay cascade blocks

The upper blocks form part of the backstay cascade. Check the purchase, attachment method and load for the whole system.

View soft-attach blocks

Part 29 · Know your J/70

Backstay deck-lead blocks

The lower blocks guide the backstay adjustment lines. Match the attachment and line route on both sides of the cockpit.

View single blocks

Part 30 · Know your J/70

Boom vang tackle

The vang controls boom lift. Match the blocks, purchase and attachment fittings as a complete system.

View J/70 vang & Cunningham parts

Part 31 · Know your J/70

Boom-mounted control blocks

Soft-attach blocks on the boom carry mainsail controls. Check the exact function, attachment and required working load.

View soft-attach blocks

Part 32 · Know your J/70

Mast-base lead blocks

Lead blocks and cleats at the mast foot route halyards and controls toward the cockpit. Check each line path and attachment.

View J/70 mast-base fittings

Part 33 · Know your J/70

Tiller & extension

The tiller and extension let the helm steer from different positions. Match the rudder connection and extension joint.

View J/70 deck & rudder hardware

Part 34 · Know your J/70

Tiller & extension

The steering controls run forward from the transom-mounted rudder. Check the tiller connection, joint and extension length.

View J/70 deck & rudder hardware

Part 35 · Know your J/70

Traveler car & track

The transverse traveler positions the mainsheet attachment. Match the car, rail profile and end-control fittings.

View J/70 mainsheet & traveler

Part 36 · Know your J/70

Primary winches

The paired winches serve the loaded sheets. Compare size, gearing and deck mounting with the installed units.

View standard winches

Part 37 · Know your J/70

Jib tracks & cars

The two short tracks position the jib leads. Match the track profile, car and attachment dimensions.

View J/70 jib handling

Part 38 · Know your J/70

Keel access cover

This cover sits above the keel access area in the cockpit. Check the opening, latch and installed cover version.

Explore Keel access cover

Part 39 · Know your J/70

Companionway

The cabin entrance and its closure provide access below deck. Match the opening and closure system to the boat.

Explore Companionway

Part 40 · Know your J/70

Mast step

The deck fitting locates the foot of the mast. Versions differ: confirm the mast maker, base geometry and fastening pattern.

View J/70 rigging & mast fittings

Part 41 · Know your J/70

Forward ventilation hatch

The forward cabin hatch provides ventilation. Measure the opening and check the frame, hinges, latch and seal.

Explore Forward ventilation hatch

Part 42 · Know your J/70

Jib furling system

The furling connection is at the bow, with the mechanism below deck. Match the swivel, forestay and installed furling unit.

View J/70 furling parts

Part 43 · Know your J/70

Bowsprit & tack fitting

The projecting bowsprit carries the spinnaker tack. Check the tube, housing, seals and end fitting before replacement.

Explore Bowsprit & tack fitting

Part 44 · Know your J/70

Lifelines & stanchions

The low stanchions and stern rails support the cockpit safety lines. Match the wire lengths, terminals and deck connections.

View J/70 lifelines

J/70 diagram

Scroll to inspect the full diagram. Open image in a new tab

J/70 Running Rigging

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