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Diesel Marine Propulsion Engines & Marine Generating Sets

Gearbox Options

Beta Marine offer the following gearbox options and reduction ratios. Having carefully selected the most suitable gearboxes to match the torque loading of each engine, these will be correct for the majority of seagoing or inland waterway vessels.

However, for some heavy duty use applications, such as commercial fishing, hire boat rental, ferries, etc… a heavier duty gearbox and/or a different reduction ratio may be more appropriate. The Beta Marine technical team have a wide and deep bank of knowledge and would be pleased to discuss your needs and advise appropriate solution(s).

We also offer a bespoke service of mounting your existing gearbox on to a new Beta engine, this will incur a build cost which will be advised in advance of manufacturing. Transport of the existing gearbox to Beta Marine is the customer’s responsibility.

For further information or specific advice please contact Beta Marine.

Technodrive (Mechanical Gearbox)RatioBeta 14Beta 16Beta 20Beta 25Beta 30Beta 38
TMC 602.00:1
2.45:1
2.83:1
ExtraExtraExtraExtraStandardStandard
Oil Cooler for LH in aheadExtraExtraExtraExtraExtraExtra
PRM Marine (Mechanical Gearbox)RatioBeta 14Beta 16Beta 20Beta 25Beta 30Beta 38
PRM 802.04:1
2.50:1
StandardStandardStandardStandardStandard-
PRM 1202.04:1
2.50:1
2.94:1
ExtraExtraExtraStandardStandardStandard
PRM Marine (Hydraulic Gearbox)RatioBeta 14Beta 16Beta 20Beta 25Beta 30Beta 38
PRM 1502.09:1
2.82:1
ExtraExtraStandardStandardStandardStandard
PRM 2801.96:1
2.94:1
----ExtraExtra
Technodrive (Hydraulic Gearbox)RatioBeta 43Beta 50Beta 60Beta 75Beta 90Beta 105Beta 115
TM 3452.00:1
2.47:1
ExtraExtraExtraStandard---
PRM Marine (Hydraulic Gearbox)RatioBeta 43Beta 50Beta 60Beta 75Beta 90Beta 105Beta 115
PRM 1502.09:1
2.83:1
StandardStandardStandard----
PRM 2801.96:1
2.94:1
StandardStandardStandardStandardStandardStandardStandard
PRM 5001.94:1
2.57:1
2.90:1
StandardStandardStandardStandardStandardStandardStandard
Hydraulic 'Soft Shift'ExtraExtraExtraExtraExtraExtraExtra
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