PRM1500 Marine Gearbox

Full Hydraulic Operation:  Drop Centre Output Shaft, Two-Stage Reduction Gearing
PRM1500 series marine transmissions are the ideal choice for pleasure and commercial craft applications with engines rated at up to 526 hp (393 kW).  They are available in both shallow and deep case form - corresponding to reduction ratios ranging from 1.22:1 to 3.0:1, and 3.12:1 to 4.9:1 respectively - and are supplied with integral SAE housings as standard.
All PRM1500 series transmissions feature a  twin countershaft design compatible with left or right hand propeller rotations - making them equally suitable for both single or twin engine installations.  In addition, the maximum torque of 1500 Nm can be transmitted in either direction at engine speeds of up to 2500 rev/min.
 
Simple Operation
  • Operation is by a single lever compatible with proprietary remote control operating systems.
  • The need for special purpose automatic transmission fluid is eliminated by the use of engine oil specification lubricant.
  • Smooth drive engagement in both ahead and astern is achieved by a pressure modulated selection valve - ensuring outstanding boat handling and manoeuvrability.

 
Durable and Reliable
  • PRM1500 units carry Lloyd's approved published ratings and utilise maintenance-free, oil-operated, self-adjusting multi-disc clutches for consistent reliability and in-service performance.
  • The gearcase is manufactured from high grade cast iron and is internally ribbed for extra rigidity and strength.
  • The oil pump, oil filter and hydraulic control valve on all PRM1500 models are mounted externally for easy access and servicing.
Two optional clutched power take-offs - compatible with SAE classification hydraulic pumps - are available to drive on-board machinery.  Further ancillary equipment for PRM1500 gearboxes includes an oil pressure gauge, oil cooler kit and electrically operated control valve - incorporating a trolling valve facility that allows propeller speeds to be varied down to zero.  This is fully inter-changeable with the standard control valve and can be retrofitted in service.

 

Nominal Power Ratings,  PRM1500 Deep Case Marine Gearbox
MODEL RATIOS PLEASURE LIGHT COMMERCIAL HEAVY COMMERCIAL
BHP kW BHP kW BHP kW
1500D31SAE1
1500D31SAE2
3.12:1 21.06 15.70 19.65 14.65 18.28 13.63
1500D39SAE1
1500D39SAE2
3.88:1 21.06 15.70 19.65 14.65 18.28 13.63
1500D45SAE1
1500D45SAE2
4.50:1 21.06 15.70 19.65 14.65 18.28 13.63
1500D49SAE1
1500D49SAE2
4.90:1 18.28 13.63 16.87 12.58 15.46 11.53
Maximum Operating Speeds:  intermittent 3000 rev/min , continuous 2500 rev/min .
(D) denotes Deep Case: manufactured only with integral SAE1 or SAE2 adaptor housings. If there is a need to convert from SAE1 to SAE3, then additional adaptor ring MT8239 will also be required.

 

Nominal Power Ratings,  PRM1500 'A' Marine Gearbox (Angle Drive Only)
MODEL RATIOS PLEASURE LIGHT COMMERCIAL HEAVY COMMERCIAL
BHP kW BHP kW BHP kW
1500S12SAE3 1.22:1 21.06 15.70 19.65 14.65 18.28 13.63
1500S15SAE3 1.56:1 21.06 15.70 19.65 14.65 18.28 13.63
1500S19SAE3 1.94:1 21.06 15.70 19.65 14.65 18.28 13.63
1500S22SAE3 2.25:1 21.06 15.70 19.65 14.65 18.28 13.63
1500S24SAE3 2.45:1 21.06 15.70 19.65 14.65 18.28 13.63
1500S30SAE3 3.0:1 18.93 14.12 17.52 13.07 15.77 11.76
Maximum Operating Speeds:  intermittent 3000 rev/min , continuous 2500 rev/min .
(S) denotes Shallow Case: manufactured only with integral SAE3 adaptor housings.

Note: These powers are expressed in BHP and kW per 100 rev/min engine operating speed, and are measured at the engine flywheel.  Ratings have been established to ensure the long trouble-free life of the gearbox which should not, therefore be used at powers in excess of those shown.

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Noss Marina,  Bridge Road,  Kingswear, Dartmouth,  Devon,  TQ6 0EA
Tel / Fax: +44 (0)1803 833343,  Mobile: 07855 255217  VAT Registration No. 737 278 307