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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 10Beta 14Beta 16Beta 20Beta 25Beta 30Beta 35Beta 38Beta 45T
TMC 401.50:1
2.00:1
2.60:1
StandardStandardStandardStandardStandardStandard---
TMC 602.00:1
2.45:1
2.83:1
-ExtraExtraExtraExtraExtraStandardStandardStandard
Oil Cooler for LH in ahead-ExtraExtraExtraExtraExtraExtraExtraExtra
TMC 60A2.00:1
2.45:1
-StandardStandardStandardStandardStandardStandardStandardStandard
PRM Marine (Mechanical Gearbox)RatioBeta 10Beta 14Beta 16Beta 20Beta 25Beta 30Beta 35Beta 38Beta 45T
PRM 902.04:1
2.50:1
StandardStandardStandardStandardStandardStandard---
PRM 1252.04:1
2.50:1
2.94:1
-----ExtraStandardStandard-
PRM Marine (Hydraulic Gearbox)RatioBeta 10Beta 14Beta 16Beta 20Beta 25Beta 30Beta 35Beta 38Beta 45T
PRM 1502.09:1
2.82:1
ExtraExtraExtraStandardExtraStandardStandardStandardStandard
PRM 2601.96:1
2.94:1
-----ExtraExtraExtraExtra
PRM 260C Inline1.96:1
2.94:1
-----ExtraExtraExtraExtra
ZF (V Drive Gearbox)RatioBeta 10Beta 14Beta 16Beta 20Beta 25Beta 30Beta 35Beta 38Beta 45T
ZF 15 MIV2.13:1
2.64:1
3.00:1
StandardStandardStandardStandardStandardStandardStandardStandardStandard
Technodrive (Mechanical Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
TMC 602.00:1
2.45:1
StandardStandard-------
TMC 60A2.00:1
2.45:1
StandardStandard-------
Oil Cooler for LH in aheadExtraExtra-------
TMC 2602.00:1
2.47:1
2.88:1
ExtraExtraStandard------
Technodrive (Hydraulic Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
TM 3452.00:1
2.47:1
ExtraExtraExtraStandardStandardStandard---
TM 345A2.00:1
2.47:1
ExtraExtraExtraExtraExtraExtra---
Trolling Valve for TM 345ExtraExtraExtraExtraExtraExtra---
TM 932.09:1
2.40:1
2.77:1
---ExtraExtraExtraStandardStandardStandard
TM 93A2.09:1
2.40:1
---ExtraExtraExtraExtraExtraExtra
Trolling Valve for TM 93---ExtraExtraExtraExtraExtraExtra
PRM Marine (Hydraulic Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
PRM 1502.09:1
2.83:1
StandardStandard-------
PRM 2801.96:1
2.94:1
ExtraExtraStandardStandardStandardStandardStandardStandardStandard
PRM 260C Inline1.96:1
2.94:1
ExtraExtraExtraExtraExtraExtraExtraExtraExtra
PRM 5001.94:1
2.57:1
2.90:1
--ExtraExtraExtraExtraExtraExtraExtra
Hydraulic 'Soft Shift'ExtraExtraExtraExtraExtraExtraExtraExtra
ZF (Mechanical Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
ZF 25M1.88:1
2.74:1
StandardStandardStandard------
ZF (Hydraulic Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
ZF 251.97:1
2.80:1
StandardStandardStandard-Standard----
ZF 25A1.92:1
2.29:1
2.71:1
StandardStandardStandard-Standard----
ZF 452.20:1
2.50:1
3.00:1
---StandardExtraStandardStandardStandardStandard
ZF 45A2.03:1
2.43:1
---StandardExtraStandardStandardStandardStandard
ZF (V Drive Gearbox)RatioBeta 43Beta 50Beta 60Beta 70TBeta 75Beta 85TBeta 90TBeta 105TBeta 115T
ZF 15 MIV2.13:1
2.72:1
StandardStandard-------
ZF 63 IV1.99:1
2.48:1
ExtraExtraStandardStandardStandardStandardStandardStandardStandard
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