TRANSMARINE, INC.
YOUR MARINE ENGINE, GENERATOR AND TRANSMISSION SOURCE
FAQ
 |
TRANSMARINE, INC. 2221 Magnolia Drive DeLand, Florida, 32724 386-717-5225 Service@boatgears.net |
FREQUENTLY ASKED QUESTIONS
A. FAQ's about Velvet Drive & Borg-Warner Marine Transmissions:
Q. What is meant by Left Hand (LH) and Right Hand (RH) rotation?
A. An engine that is turning counter-clockwise from the rear, the top of the flywheel turns to the left,
is called a Left Hand engine. It is also called automobile rotation or standard rotation.
An engine that turns clockwise from the rear, the top of the flywheel turns to the right, is called a
Right Hand (RH) engine. They are also called marine rotation or counter rotation.
Q. Is it true that you can run Borg-Warner/Velvet Drive marine transmissions with either LH or RH
engines?
A. Some models will operate with either LH or RH engines if the pump is set to match the engine
rotation. Some models are made to only operate with LH engines. See the Rotation Guide page
for a list of models that will and will not work with both rotations.
Q. How can I make my Velvet Drive transmission reverse its output rotation in forward?
A. The short answer is you can't. The reason is that, except for certain models specifically designed
to reverse the output rotation in forward, the reverse gear is not made to handle speed higher than
idle RPM. Reversal or non-reversal of rotation between input and output is due to the internal
layout of the gear reduction section and it is not changeable without changing the reverse pinion
carrier and/or all the reduction gearing. This option is normally more expensive than replacing the
transmission. See the Rotation Guide page for specific rotation information.
Q. I have a sailboat, will it hurt my Velvet Drive transmission to free-wheel when I am under sail?
A. Free-wheeling is not recommended. All Velvet Drive / Borg-Warner Marine Transmissions require
the engine to be running to deliver lubrication to the various bearing and gears.
Q. Why is the replacement of the fluid cooler required by the warranty?
A. The construction of most fluid coolers precludes their total clean out. Leftover particles in the cooler
can break loose and go through the transmission. Also over time corrosion and scale can build up on
the inside of the cooler and reduce heat transfer.
Q. What is meant by Left Hand (LH) and Right Hand (RH) rotation?
A. An engine that is turning counter-clockwise from the rear, the top of the flywheel turns to the left,
is called a Left Hand engine. It is also called automobile rotation or standard rotation.
An engine that turns clockwise from the rear, the top of the flywheel turns to the right, is called a
Right Hand (RH) engine. They are also called marine rotation or counter rotation.
Q. Is it true that you can run Borg-Warner/Velvet Drive marine transmissions with either LH or RH
engines?
A. Some models will operate with either LH or RH engines if the pump is set to match the engine
rotation. Some models are made to only operate with LH engines. See the Rotation Guide page
for a list of models that will and will not work with both rotations.
Q. How can I make my Velvet Drive transmission reverse its output rotation in forward?
A. The short answer is you can't. The reason is that, except for certain models specifically designed
to reverse the output rotation in forward, the reverse gear is not made to handle speed higher than
idle RPM. Reversal or non-reversal of rotation between input and output is due to the internal
layout of the gear reduction section and it is not changeable without changing the reverse pinion
carrier and/or all the reduction gearing. This option is normally more expensive than replacing the
transmission. See the Rotation Guide page for specific rotation information.
Q. I have a sailboat, will it hurt my Velvet Drive transmission to free-wheel when I am under sail?
A. Free-wheeling is not recommended. All Velvet Drive / Borg-Warner Marine Transmissions require
the engine to be running to deliver lubrication to the various bearing and gears.
Q. Why is the replacement of the fluid cooler required by the warranty?
A. The construction of most fluid coolers precludes their total clean out. Leftover particles in the cooler
can break loose and go through the transmission. Also over time corrosion and scale can build up on
the inside of the cooler and reduce heat transfer.
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