Ql Bow Thruster Manual Link

The Volvo Penta QL (Quality Line) series, specifically models like the , , and Go to product viewer dialog for this item.

2.1 Tunnel Positioning

  • Depth: The tunnel must be positioned as deep as possible but fully submerged at maximum hull trim angle. Typically, 3/4 of the tunnel diameter should be below the waterline.
  • Distance from bow: The manual specifies a minimum distance from the bow stem to avoid ventilation (sucking air down the hull side). Generally, this is 1.5x the tunnel diameter.

By respecting the Ql Bow Thruster Manual, you ensure that when the wind pins you against a dock, your thruster will perform flawlessly. Safe maneuvering. Ql Bow Thruster Manual

Common replaceable parts with QL codes (examples – verify with your manual):

  • Propeller: QL-PROP-55 for 55kgf models (left-hand vs right-hand available).
  • Anode kit: QL-ZINC-T55.
  • Control relay box: QL-RELAY-12V-250A.
  • Joystick panel: QL-JOY-PRO.

While QL bow thrusters are robust and reliable, the brand was eventually phased out and integrated fully into the Volvo Penta "Quick" thruster range. This guide serves as a manual overview for owners maintaining legacy QL units. The Volvo Penta QL (Quality Line) series, specifically

  • Choose a suitable location for the thruster, taking into account the boat's design and layout
  • Mount the thruster to the hull using the provided hardware
  • Connect the electrical system and control panel
  • Test the system to ensure proper operation

D. Electrical Connections

The thruster draws massive current (often 200–400 amps). Depth: The tunnel must be positioned as deep

How To: Use a Bow Thruster Effectively | Motor Boat & Yachting

2.2 Hydraulic vs. Electric Models

  • Electric QL Thrusters: These require dedicated battery banks. The manual specifies minimum Cold Cranking Amps (CCA) and recommends cable sizes (e.g., 95mm² for long runs). Crucial: The manual warns against using standard automotive cables; marine-grade tinned copper is mandatory.
  • Hydraulic QL Thrusters: The manual details the Power Take-Off (PTO) connection to your main engine. It specifies hydraulic oil viscosity (usually ISO VG 32 or 46 depending on climate). Incorrect oil leads to cavitation and pump failure.