PRM Transmissions:
Trolling Valve for PRM gearboxes
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This essential devise gives you total control of your propeller speed - from 1200 rpm down to zero, and fits all the units in the PRM range from the PRM 260 upwards. The traditional mechanical Trolling Valve operates by draining oil from the cooling system of a gearbox and forcing it to 'slip.' Unfortunately, this causes the unit to rapidly overheat, and so can only be used in relatively short bursts. |
The PRM Trolling Valve however, is an electrically operated proportional valve that works by reducing the operating oil pressure of the clutch. No oil is lost from the cooling system and so the unit can operate continuously, if necessary, giving you far more control over your craft. Operated from a joystick at the helm, and hermetically sealed from both fresh and salt water, the unit is supplied with a micro switch that will automatically turn off the Trolling Valve when the engine speed exceeds 1200 rpm.
It comes in 12-volt and 24-volt versions.
PRM Transmissions:
Power Take off's for PRM gearboxes
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Many boats require auxiliary power to run on-board machinery like pumps, winches, compressors or alternators. Taking an extra drive off the front of the engine, an expensive and space consuming installation, has often been the only way to achieve this. PRM Power take-offs have been designed to bolt directly onto the rear of the gearbox and can be supplied with a new transmission, or easily retro-fitted. |
There are three models to choose from:
- Live: Fits the PRM 500 & 750 and is capable of delivering 29.5 hp/22 kW, which is equal to 209 Nm (155 lbf.ft - 21.33 kgm) of torque.
- Clutched: Gives exactly the same performance figures as the live unit, though being clutched allows you to engage or disengage the unit from the drive.
- Electrically clutched: Fits the 1500 only. The clutch is operated by solenoid connectors and can deliver 90 hp/66 kW, producing 640 Nm (474 lbf.ft - 65 kgm) of torque.
For both these items contact us for UK best prices.
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PRM Gearboxes
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