I have a 1980 H18. The shock cord in the boom needs to be replaced. I have a length of new shock cord but the old one is in such bad shape I cannot tell how long the cord needs to be.
Searched the form but could not find a reference to length. I believe it to be 1/4 inch.
I was also wondering what the purpose of this cord is?
Thanks Bob

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Bob
Indio Ca
1980 Hobie 18
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bob, this should be what you're looking for

Boom Shockcord 1/4" Shockcord x 7' 1 ea. if you need anything else, here's the whole mess from hobie.

here's a description of what it does:
the outhaul is a line which is part of the running rigging of a sailboat, used to extend a sail and control the shape of the curve of the foot of the sail. It runs from the clew (the back corner of the sail) to the end of the boom. The line is pulled taut to the appropriate tension to provide the desired shape to the foot and then secured to a cleat on the boom.

Hobie Cat Line Guide (page 3 of 5)

HOBIE 18 & 18SX
Mainsheet Line 7/16" Spun Braid x 48' 1 ea.
Jibsheet Line 5/16" Spun Braid x 44' 1 ea.
Main Halyard Line - 18 3/16" Halyard x 58' 1 ea.
Main Halyard Line - 18SX 3/16" Halyard x 61' 1 ea.
Jib Halyard Line - 18 1/12" Flag Halyard x 20' 1 ea.
Jib Halyard Line - 18SX 1/12" Flag Halyard x 20' 1 ea.
Outhaul Line 3/16" Halyard x 7' 1 ea.
Downhaul Line - 18 3/16" Halyard x 5' 1 ea.
Downhaul Line - 18SX 3/16" Halyard x 7' 1 ea.
Jib Luff Tensioner 1/8" Flag Halyard x 5' 6" 1 ea.
Mast Rotation Control 3/16" Halyard x 3' 1 ea.
Jib Furler Assy Line 1/8" Flag Halyard x 17' 1 ea.
Boom Shockcord 1/4" Shockcord x 7' 1 ea.
Storage Cover Line 5/16" Spun Braid x 1' 7" 2 ea.
Daggerboard Shockcord 1/4" Shockcord x 3' 10" 2 ea.
Daggerboard Handles 7/16" Spun Braid x 2' 6" 2 ea.
Jibsheet Tangle Prev. 1/4" Shockcord x 4' 6" 1 ea.
Center Tramp Lace 1/4" Halyard x 13' 1 ea.
Aft Tramp Lace Line 1/4" Halyard x 15' 2 ea.
Wing Tramp Lacing Line 3/16" Halyard x 32' 2 ea.
Trap Shockcord 1/4" Shockcord x 7'w/1 Loop 4 ea.
Trap Adjustment 1/4" Yacht-Single x 3' 6" 4 ea.
Batten Tie 1/12" Flag Halyard x 1' 6" 10 ea.

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Mike Conway
H16
Hilton, NY
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Mike thank you for the great list, I will be printing this to add to my information. Bob

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Bob
Indio Ca
1980 Hobie 18
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