Technical Reference Manual
Shift and Throttle Control Cables
The control cable is a very important component in
the control system. It is the vital link between the
control head and the propulsion unit. Employing the
best cable helps insure that your shift and throttle
system operates smoothly and efficiently. The
design, technology, and materials which are used in
Teleflex Marine cables have literally set the standard
for the entire marine industry.
Our control cables are environmentally tested for
marine applications. They have stainless steel
terminals and conduit fittings as well as stainless or
nylon covered core wires with moisture protective
seals for added corrosion protection and longer
life. Their durable HDPE outer jackets resist
abrasion and withstand the effects of UV, salt water,
chemicals, gasoline, and oil. Each Teleflex Marine
cable is lifetime lubricated at the factory.
Teleflex Marine pioneered the development of high
efficiency control cables. Since not all cables utilize
this technology there can be significant operating
differences between Teleflex Marine cables and
How to Choose the Right 3300/33C Cable:
Teleflex Marine offers several models of universal
3300/33C type cables, each suited to certain
operating conditions and installation parameters.
Below are key variables that affect how cables
Backlash: the lost motion between the amount of
movement put in (input end of the cable) and the
amount of movement which occurs at the output end
of the cable. Some motion is generally lost in "take
up" between the inner wire (core) of the cable and
the outer casing (conduit). Backlash manifests itself
as free play (slop) felt at the control handle.
Efficiency: the percentage of input force that is
transmitted through the cable as output force.
For example, if a 10-pound force was exerted on
the cable at its input end and resulted in the cable
exerting an 8-pound output force, the cable would
be 80% efficient.
Breakaway: the "feel" of the cable when put into
motion; the breakaway thresh old is the force that
must be applied to the cable's input end before
something happens at the output end. An example
of excessive breakaway: a control that would have
to be moved to half-throttle before the engine
Cable Routing: the shorter and straighter the
cable routing, the better the cable will perform. With
increased length and bends, cable efficiency is
reduced, while breakaway and backlash rise.
Environment: generally, the more rugged the cable
construction, the longer the cable will last. In harsh
environments such as heavy salt and UV exposure,
control cables with thicker conduits and stainless
steel fittings will generally outlast those with thinner
conduits and brass or steel fittings.
Cable design, manufacturing tolerances, length and
installation care are additional factors to consider.
|3300/33C CABLE TYPE||BACK-LASH||BREAK-AWAY EFFICIENCY||LONG/COMPLEX ROUTINGS||HARSH ENVIRONMENT|
|33 Supreme||Very Good||Very Good||Very Good||Superior|