ZF - Marine Transmission 2.0:1 - 3312003014
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The ZF Marine V-Drive Transmission 3312003014 is a hydraulic marine gearbox commonly identified as the ZF 63IV series, historically associated with the Hurth HSW630V1. This V-drive transmission is used in inboard ski boats, wake boats, towboats, and compact engine-room installations where the engine remains level while the output angle routes power to the propeller shaft.
Key Features
- ZF Marine V-drive transmission
- Part number: 3312003014
- Model reference: ZF 63IV / Hurth HSW630V1
- Gear ratio: 2.000:1
- Ratio references may also appear as 1.992:1 ahead / 2.033:1 astern
- Built-in 12° output angle
- Mechanical shift control configuration
- Reversible marine transmission design
- Sea-water resistant aluminum alloy housing
Application Compatibility
Used in compatible inboard V-drive marine applications requiring the ZF 63IV / HSW630V1 transmission layout, 2.0:1 ratio, mechanical actuation, and 12° V-drive output configuration. Common applications include premium towboats, ski/wake boats, and sport cruisers with compact engine-bay layouts.
Fitment Notice
Verify fitment by transmission model tag, gear ratio, mounting footprint, output flange layout, input coupling, shift actuation, cooler line routing, and vessel drivetrain requirements before ordering. Marine transmissions must be matched to engine output, shaft rotation, propeller setup, and installation geometry.
When This Part Needs Replacement
Replace or upgrade the transmission if the existing unit has internal gear damage, slipping, pressure loss, bearing noise, metal contamination, severe fluid contamination, cracked housing, shift failure, or damage that is not practical to rebuild.
Installation Notes
Confirm the model tag and ratio before removal. Inspect the engine coupling, shaft alignment, mounts, cooler, hoses, fluid condition, and shift cable adjustment during installation. Final alignment should be completed in the vessel after the drivetrain is settled and supported correctly.
Alternate/Superseded Part Numbers
Primary reference: ZF 3312003014. Model references include ZF 63IV and Hurth HSW630V1. Current replacement reference commonly associated with this unit: ZF 68IV, part number 3312003209.
Parts Desk Insight
With V-drive transmissions, the ratio and mounting footprint matter just as much as the model name. Confirming the original tag before ordering helps avoid issues with shaft angle, coupling alignment, rotation, and propeller performance.
Shipping: Locally warehoused, may take up to 3 days to ship. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.