Two types of tubing materials are available for plumbing Inboards and Sterndrives.

1. SeaStar 3/8" outside diameter nylon tubing
2. 3/8" outside diameter copper refrigeration tubing

SeaStar 3/8" outside diameter nylon tubing is recommended for;

• Inboard,
• Sterndrive, and
• Seadrive steering systems with SeaStar I (1.7 cubic inch/rev displacement) helms only. SeaStar 3/8" outside diameter nylon tubing is available in the following lengths:

SeaStar 3/8" nylon tubing is not recommended for use in systems with SeaStar II helms or SeaStar HP helms. It is also not recommended for use in SeaStar I systems where the total tubing run exceeds 100 feet. In these cases outboard hose or 3/8" dia. copper tubing must be used.

Copper Tubing 3/8" outside diameter copper tubing is recommended for;

• inboard,
• sterndrive, and
• seadrive steering systems with SeaStar II (2.4 cubic inch/rev displacement) helms only, or where the length of tubing run exceeds 100 feet (30.5m).

Additional SeaStar hose kit part number HF5508 is required to connect the tubing to the cylinder.

3/8" copper tubing should be obtained through a local vendor based on the following tubing specifications.

Specification for copper tubing:
Annealed Copper Refrigeration Tubing 0.032 wall thickness 3/8" outside diameter

From the illustrations (figures A through C), select the situation which best suits your application and note;

a) the type of drive system, and

b) the number of steering stations.

 

1. From the illustration which best suits your application note the number of lengths of tubing and fitting kits required.
2. Measure along the intended path of tube routing for each of the tubing runs.
3. Determine if 3/8" nylon tube can be used or if copper tubing is required based on lengths of tubing runs required.
4. Total up the entire length of tubing required and round up to the next available tube kit length.

Figure A
Single Inboard Cylinder Fittings required supplied with helm and cylinder

Figure B
Single Sterndrive Cylinder Fittings required supplied with helm and cylinder

1. Refer to illustration Figure C.
2. Determine the location of the second station or autopilot power pack.
3. Measure along the path of the tube routing from the upper helm pump to the second station or autopilot power pack. Multiply this length by three for the amount of tubing required.
4. Select the tubing kit based on the total system tubing requirement.