TFL Outboard Lower Unit

TFL 542B40 outboard lower unit from zippkits!

This nicely made unit can take a 36mm electric motor or an OS 3.5 nitro engine.

Same mounting as the OS lower unit.

Machined from billet 6061 aluminum and clear anodized.

Recommended for 4S or 3.5 nitro power only as 6S may damage it.

4mm flex shaft with both ends square.

Will fit props to 47mm diameter.

Unit comes without prop or motor.

Includes:
Billet aluminum lower unit with flex shaft service port on side
Flex shaft
Square adapter for 5mm motor shaft
Carbon fiber cavitation plate
Water pickup
Prop shaft assembly
Drive dog
Electric/Nitro mounting plate
Mounting and steering parts

Note that the 3mm ball ends included are plastic and short. We recommend upgrading to 3mm aluminum ball links HERE.

Spare flex shaft HERE
Spare drive dog HERE

If you need a motor and ESC for this look at our 4S Power Combo for a scary fast setup.

Choose to add prop:
4014/3 CNC prop is a great all-around prop if you have no idea what prop to use for your application
4214/3 CNC prop is an excellent prop for light, 4 cell tunnel hulls with 2000 or so kv.

  • Model: 3519
  • Shipping Weight: 2.1 lbs
  • 10 Units in Stock

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Starting at: $149.00

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This product was added to our catalog on Friday 30 October, 2026.