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PRM 125D Drop Centre Marine Gearbox (Ahead Ratio 2.94:1)

Part No: PRM-125D3

Simple mechanical operation, lightweight, compact & rugged. The PRM125 gearbox is designed for use in pleasure craft where a simple lightweight transmission is required. The cone clutches... Read more

Description

Description

Simple mechanical operation, lightweight, compact & rugged.

The PRM125 gearbox is designed for use in pleasure craft where a simple lightweight transmission is required.

The cone clutches for both ahead and astern are mechanically operated and require no adjustment.

The gearbox is purpose built to operate with standard rotation engines i.e. providing a clockwise rotation of the gearbox input shaft when viewed on input. In forward drive the output shaft rotates opposite to input shaft therefore requiring a right hand propeller.

The reduction ratios offered are 2.04:1, 2.5:1 and 2.94:1 with a common astern ratio of 2.5:1

The heavy duty aluminium gearcase is externally ribbed for strength and heat dissipation and therefore requires no oil cooler.

Direction actuation is by a lever with positive detent positions for ahead, neutral and astern. It is suitable for use with proprietary remote control operating systems which must be of the single lever dual action type.

It is essential for the engine, transmission model, reduction ratio and propeller size to be correctly matched so that the engine can attain its rated speed appropriate to the relevant service classification without labouring.

It is also necessary to ensure the torsional compatibility of the complete propulsion system from engine through to propeller, since disregarding this may result in gear noise, particularly at low speed operation, and may even result in damage to the engine as well as the transmission components.

Oil Cooling

The normal operating temperature should be in the range 50°C to 95°C using a good quality Automatic Transmission Fluid.

Propeller Free Wheeling

The PRM125 output shaft can be rotated continuously with the gearbox in neutral. It is therefore not necessary to fit a propshaft brake when running with the engine shut down, for example when sailing.

PRM120 Gearbox spline: 10 teeth B10 x 23 x 29mm DIN 5464. PRM 120 Gearbox coupling: 4", 4 holes, 3¼" PCD, 2½" female register. Oil Capacity: 0.4 litres (0.7 pints).

Specifications
Capacity Oil Capacity: 0.8 Litres (1.4 pints)
Brand PRM
Gearbox Manufacturer PRM
Gearbox Model PRM 125D
Country of Origin United Kingdom
Hydraulic or Mechanical Mechanical
Shaft Arrangement Drop Centre
Warranty 2 Years
Approximate Dry Weight 16kg (35lbs)
Construction Heavy Duty Aluminium Gearcase
Gearbox Coupling 4", 4 holes, 3-1/4" PCD, 2-1/2" female register
Gearbox Spline 10 teeth B10 x 23 x 29mm DIN 5464
Nominal Power Rating Light Commercial 0.80 BHP / 100 RPM
Nominal Power Rating Pleasure 1.15 BHP / 100 RPM
Ratio Ahead Stern 2.94:1
Replaces PRM 120D3 Gearboxes
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PRM 125D Drop Centre Marine Gearbox (Ahead Ratio 2.94:1)

£847.08

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£847.08 Incl VAT

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