Velvet Drive ZF Hurth Marine Transmission Neutral Safety Switch OEM 1000-640-004


105 in stock

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Product Details

New neutral safety switch for Velvet Drive, Borg Warner, ZF, and Hurth marine boat transmissions. This is an OEM switch from Velvet Drive, part number 1000-640-004 (1000640004). Exact replacement for ZF 3312308029. These take an 7/8″ wrench to install. View the below chart for applications.


Velvet Drive
Borg Warner
71C Series
72C Series
73C Series
5000 Series
Liberty Series
63, 63A, 63IV
80A, 80IV
85A, 85IV
HurthHSW 450A, HWS 450D
HSW 630H, HSW 630A, HSW 630V
HSW 800A, HSW 800V, HSW 800A3

There is also a larger, older style neutral safety switch used on older Borg Warner transmissions, which uses a 1-1/8″ wrench to install. If you have this one, you may want to consider converting to the new style using the 1004-420-052 kit.

Additional information

Product Specifications
Part Number1000-640-004
ManufacturerVelvet Drive
Manufacturer Part Number1000-640-004
Item Weight0.2 lbs
BrandVelvet Drive
Warranty1 Year
Country of ManufactureUnited States
Shipping Weight0.2 lbs
Shipping Dimensions5" x 3" x 3"
TypeNeutral Safety Switch
FitsVelvet Drive 71C, 72C, Liberty, ZF 63, 80, 85