Ultraflex Group

outboard electric engine cables for hydraulic steering systems boat boating products accessories

Selection of steering system Outboard steering systems HYDRAULIC STEERING SYSTEMS

Selection of steering system

The strength required to drive a boat equipped with a hydraulic steering system is inversely proportional to the number of turns of the wheel lock-to-lock. The wheel turns are determinated by the ratio between the cylinder volume, pump displacement.
With the same type of cylinder installed on the engine, the less are the turns, the faster is the response but higher is the effort; more wheel turns, slower is the response and lower is the effort.


Other factors that can influence steering effort are:

• Vessel speed

• Rudder dimension, or engine power

• Propeller selection

• Hull type (displacement, planing, etc.)

• Sea conditions

• Oil viscosity
 

HYDRAULIC OUTBOARD STEERING SYSTEMS

SUGGESTION AND WARNINGS WHEN SELECTING A HYDRAULIC OUTBOARD STEERING SYSTEM

Max hp powernot applicablenot applicable

OUTBOARD CYLINDERS Maximum power rating applicable

Cylinder

model

 

Single engine

single cylinder

 

Bimotore singolo cilindro

Bimotore doppio cilindro

 

NON counter

rotating propellers

 

 

Counter

rotating propellers

 

 

NON counter

rotating propellers

 

 

Counter

rotating propellers

 

Max hp power Max hp power Max hp power Max hp power Max hp power
UC81-OBF 115 not applicable not applicable not applicable not applicable
UC94-OBF 150 not applicable not applicable not applicable not applicable
UC68-OBS 150 not applicable not applicable not applicable not applicable
UC128-OBF 300 300 500 500 600
UC130-SVS 350 350 600 600 700
UC132-OBS 300 300 450 500 600

 

WARNING: These recommendations should be used as a general reference only. Final selection should be made with the assistance of a qualified installation technician. For any further information please contact our Technical Service.

 

 

STEERING WHEEL TURNS single cylinder
 

UP18

18cc

UP20

20cc

UP25

25cc

UP28

28cc

UP33

33cc

UP39

39cc

UP45

45cc

UP28-SVS

28cc

UP33-SVS

33cc

UP39-SVS

39cc

UC81-OBF 4,5 - - - - - - - - -
UC94-OBF - 4,7 - - - - - - - -
UC128-OBF - - 4,8 4,3 3,6 3,1 - - - -
UC130-SVS - - - - - - - 4,6 3,9 3,3
UC68-OBS - 3,4/5,0 - - - - - - - -
UC132-OBS - - 5,3/6,5 4,7/5,8 4,0/4,9 3,4/4,2 2,9/3,6 - - -
UC133-IOB - - 5,6 4,7 4,0 3,4 2,9 - - -

 

STEERING WHEEL TURNS double cylinder
 

UP28

28cc

UP33

33cc

UP39

39cc

UP45

45cc

UP33-SVS

33cc

UP39-SVS

39cc

UC128-OBF - 7,3 6,2 5,3 - -
UC130-SVS - - - - 7,9 6,7
UC132-OBS - 8,0/9,8 6,8/8,4 5,8/7,2 - -
UC133-IOB - 8,0 6,8 5,8 - -