Production start date: 1989
Out of production as of 2003
| Location | Line Size/Type | Length | Quantity |
| Aft Tramp Lace Line | 1/4" Halyard | 15' | 2 ea. |
| Center Tramp Lace Line | 1/4" Halyard | 19' | 1 ea. |
| Mast Rotation Line | 3/16" Halyard | 3' | 1 ea. |
| Downhaul Line | 3/16" Halyard | 5' | 1 ea. |
| Boom Outhaul Line | 3/16" Halyard | 7' | 1 ea. |
| Boom Outhaul Shock Cord | 1/4" Shock Cord | 7' | 1 ea. |
| Main Halyard Line | 1/4" Yacht | 58' | 1 ea. |
| Mainsheet Line | 7/16" Spun Braid | 48' | 1 ea. |
| Jibsheet Line | 5/16" Spun Braid | 44' | 1 ea. |
| Jib Tensioner Line | 3/16" Yacht | 6' | 1 ea. |
| Jib Halyard Line | 1/8" Flag Halyard | 20' | 1 ea. |
| Jib Furler Line | 1/8" Flag Halyard | 17' | 1 ea. |
| Jib Luff Tensioner | 1/8" Flag Halyard | 5'6" | 1 ea. |
| Jibsheet Tangle Preventer | 1/4" Shock Cord | 5'6" | 1 ea. |
| Centerboard Line | 3/16" Yacht | 3' | 2 ea. |
| Trapeze Adjustment Line | 1/4" Yacht | 5' | 4 ea. |
| Trapeze Shock Cord | 1/4" Shock Cord with 1 Loop | 7' | 4 ea. |
| Batten Tie Down | 1/12" Flag Halyard | 1'5" | 1 per batten |
| Daggerboard Handles | 7/16" Spun Braid | 2'6" | 2 ea. |
| Daggerboard Shock Cord | 1/4" Shock Cord | 3'10" | 2 ea. |
| Storage Cover Line | 5/16" Spun Braid | 1'7" | 2 ea. |
| Magnum Wing Lacing Line | 1/4" Halyard | 13' | 2 ea. |
Good things to know when owning a Hobie 18 Magnum or SX
- Be gentle when raising and lowering the mast, due to the mast base hinge.
- There is a load capacity on the wings, be aware of it.
Good things to have when owning a Hobie 18SX or Magnum
- Mast base pin: to raise and lower the mast
Things that invariably need changing
- Aluminum rudder pins
- Rudder cams
