Morse/Teleflex

The proper steering system is a critical factor in achieving good boat handling performance and safe operation. The combination of engine horsepower, propeller torque, hull design and boat speed exerts varying loads on steering systems. Because the resulting steering forces vary considerably from boat to boat and motor to motor, extreme care must be taken to ensure the steering system you select matches the application.

WARNING

Although Morse Controls designs and manufactures steering systems that meet or exceed industry standards, some high performance boats equipped with high performance accessories can generate steering loads far in excess of 300 lbs at the tiller end. It is mandatory that such boats be water tested to ensure steering loads are within safe limits. Refer to the instruction sheet or contact Morse Controls for more information.

Plan the most direct cable route. Keep bends to a minimum; never bend below the specified radius. Trim settings, mounting position, and adherence to manufacturer specifications all affect loads and handling.

• Steering forces increase with speed and horsepower; performance boats can create high shock loads.
• Morse twin cable or hydraulic systems are generally recommended for higher speeds.
• Large outboards may cause veer; ensure sufficient mechanical advantage and smooth cable routing.
• Inspect cables regularly for corrosion or damage; lubricate per engine manufacturer specs.
• Route cables with minimal, gentle bends; avoid excessive length.
• Hydraulic steering is better for high steering loads; mechanical typically up to 35 ft boats with 300 lb tiller load max.
• For boats faster than 50 MPH, consider twin cable or Hynautic hydraulic systems.
• Maximum steering wheel diameter is 16".
• Do not exceed boat’s HP rating.

Plan the straightest possible cable path. Total bends should never exceed 360°, and no bend should be less than the recommended radius. Support long runs every ~6 ft.

Formula: Total = A + B + C
Then adjust: subtract 4" for each 90° bend. For transom/splashwell mount subtract 6". For thru-tube add 6". Round up to the next whole foot.

A = wheel centerline → gunwale
B = dash → transom
C = gunwale → transom/tilt tube centerline

Example: A 20" + B 104" + C 28" = 152"
152" − 8" (two 90° bends) = 144"
+ 6" (thru-tube) = 150" → round up to 156" (13 ft)

Transom/splashwell example: 152" − 8" (bends) = 144"
− 6" (transom mount) = 138" → round up to 144" (12 ft)

Remove the entire cable to measure accurately. Most cables have part number and length stamped on the jacket (often at the engine end). If legible, use the cross-reference guide and order that length.

If the Part Number or Length Can't Be Found

Identify the system type from the drawings, then measure the outer plastic conduit “B” dimension. Add the correct conversion factor for that system, then round as directed.

Example 1: Command 200 cable, B = 122" + 30" conversion = 152" → round up → 156" (13 ft)

Example 2: Teleflex cable, B = 124" + 23" conversion = 147" → round up to next 1/2 ft → 150" (12'6") TRC replacement cable.

Selecting the correct steering and control cable is essential for handling, maneuverability, and safety. With Morse/Teleflex now under SeaStar (Dometic), use the cross-reference guide and proper measuring to get the right fit. Following best practices for routing, installation, and maintenance will extend system life and improve performance.