Furuno CH-250 Installation Manual page 24

1.3.4 Assembling and mounting of hull unit
The hull unit is shipped as the parts shown in the hull unit kit on Equipment Lists (page iv and
after). Assemble the hull unit as shown in the procedure below.
1. Calculate necessary length of main shaft from the length of retraction tank
spare portion. When 1 m or 1.8 m long tank is used, main shaft (1.17 m or 1.97 m) can be
used without cutting off any portion.
Supplied length: 2.2 m or 3.8 m
Lt + 200 mm for 400 mm stroke
Lt + 50 mm for 250 mm stroke
Take care
not to damage.
Chamfer the edge to
protect O-ring from
damage.
14
and cut off the
Lt