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Contact Jastram Line
Card Product Index
External Links
PRM Introduction
PRM Intro
PRM80 PRM120
PRM150
PRM260
PRM500 PRM750
PRM1000
PRM1500
PRM1750
PRM Ratings
Trolling-Valve
PTOs
Older-Models
Efficiency Reliability and
Performance
PRM marine transmissions have established a
world-wide reputation for quality, reliability and in-service performance,
making them the ideal choice for pleasure, workboat and fishing vessel
applications.
  All
PRM hydraulically operated gearboxes feature a twin countershaft design, which
enables full rated power to be transmitted in ahead or astern, with either left
or right hand propellers.
PRM80 and 120 are mechanically actuated with adjustment-free cone clutches.
When correctly matched to engine and propeller,
every PRM unit will provide trouble-free operation for many years.
All parts are designed for maximum reliability
over an extended service life
In addition, running gear components are
carefully specified and machined to the highest quality standards to ensure
quiet and smooth operation.
Installation Flexibility
Purpose-designed for marine use, all standard
version PRM gearboxes have output shafts vertically offset from the crankshaft
centreline. However, to cater for the installation demands of the widest range
of hulls, both the PRM260
and PRM750 are available
with an in-line configuration, while down angle options are offered on the
PRM750 (8°) and
PRM1000 (10°), excluding
4:1 ratio versions.
PRM80, PRM120 and
PRM150 units are suitable
for use with left-hand (anti-clockwise) rotating engines only. In standard form,
all other PRM gearboxes are built for use with left-hand rotating engines, but
can be converted simply to accommodate right-hand (clockwise) rotation engines
by turning the oil pump through 180°.
A wide range of mounting adapters is available to enable PRM gearboxes to be
fitted to most popular engine models. An engine/gearbox matching chart is
available on request.
Easy Operation
Hydraulically operated, adjustment-free
multi-disc clutches ensure rapid response to operation of the control lever for
good boat handling and manoeuvrability. All models are designed for use with
proprietary single lever remote control operation systems.
Operational Convenience
Gear ratios and performance for all models
except PRM80 &
PRM120 are identical in
both left and right hand propeller configuration, making PRM units ideal choice
for twin engine installations. Propellers can be trailed indefinitely - for
example, when sailing, under tow, or in multi-engine installations where one or
more engines is shut down.
All PRM gearbox units are designed for operation with normal engine
specification lubricant - eliminating the need for special purpose automatic
transmission fluid.
Safety
Built for reliability and durability, PRM
hydraulic gearboxes are equipped with a "get you home" mechanical lock-up
device. This additional safety feature maintains the operating clutches in
engagement so that the vessel can be brought safely back to port in the
unlikely event of hydraulic failure.
A safety start switch is also available as an option on all hydraulic models.
This prevents the engine from being started unless the gearbox is in neutral -
eliminating the risk of inadvertent damage due to uncontrolled boat movement on
start-up.
Product Support
A world-wide network of distributors and
authorised agents provides comprehensive after-sales support for all PRM marine
gearboxes users, including servicing facilities and replacement parts
availability. Copies of our current UK and overseas distributor lists are
available on request.
Servicing
All PRM marine gearboxes allow easy access to
major components. In addition, service items such as oil pumps and hydraulic
control valves are conveniently mounted externally.
Gearboxes feature a split gearcase configuration to simplify major overhaul
operations.
Routine maintenance is limited to verifying operating temperatures and
pressures, checking oil levels and the occasional inspection of seals for leaks.
Optional Equipment
A range of clutched and direct drive power
take-offs is available with SAE housings to power on board equipment such as
pumps and winches.
The Newage
Trolling Valve is also available as
optional equipment on PRM260,
PRM500, PRM750,
PRM1000 and
PRM1500 models, enabling propeller
speeds to be varied from 1200 rev/min down to zero. This electronically-operated
unit is fully inter-changeable with the standard control value and can be
retrofitted in service.
PRM Intro
PRM80 PRM120
PRM150
PRM260
PRM500 PRM750
PRM1000
PRM1500
PRM1750
PRM Ratings
Trolling-Valve
PTOs
Older-Models
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