PRM NEWAGE PRM 60, Workshop Manual

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6 - PRM 60
SERVICE CLASSIFICATION DEFINITIONS
PLEASURE Limited to craft used exclusively for pleasure boating; operation at full engine throttle should not
exceed 5% of total time, with balance of usage at 90% of full throttle engine speed, or less. Maximum operation 500
hours per year. The selection of PRM 60 according to this classification for any commercial boat is not approved by
PRM Newage Limited.
LIGHT COMMERCIAL PRM Newage Limited recommends that when considering the use of the PRM 60 in boats
of whatever hull form used in light commercial applications, and in displacement and semi-displacement hull boats for
pleasure applications, these boats should be classed as light commercial duty and the gearbox selected accordingly.
Maximum operation
– 2000 hours per year.
IMPORTANT NOTE: 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.
1. GENERAL DATA
1.1Specifications
Gear ratios
– ahead
1.52:1 2.00:1 2.50:1
Gear ratio
– astern
2.05:1
– common
POWER RATING
MODEL AHEAD RATIO
PLEASURE LIGHT COMMERCIAL
BHP kW BHP kW
60D1.5 1.52:1 0.98 0.73 0.80 0.60
60D2 2.00:1 0.85 0.63 0.68 0.51
60D2.5 2.50:1 0.85 0.63 0.58 0.43
Max. Input Power 35 26 28 21
NOTE:
These powers are expressed in BHP and kW per rev/min engine 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.
Input speed:
Maximum operating speed 5000 rev/min.
Input rotation:
For engines of left-hand (anti-clockwise) rotation as viewed looking on the flywheel from behind the engine.
Output rotation:
Right-hand (clockwise) in ahead direction.
IMPORTANT:
RIGHT HAND PROPELLER REQUIRED.
Approximate dry weight:
10 kg (22lbs) excluding adaptor flange.
Oil capacity:
Approximately: 0.20 litres (0.35 pints)
Working oil temperature:
The normal operating temperature should be in the range 50°C to 95°C continuous.
Engine Mounting Adaptors:
Available in SAE5 and Velvet Drive (Borg Warner).
Input Drive Couplings:
Flexible centre damper plate SAE 6.5” or SAE 7.5”.