How it works

Due to exceptional industry-wide demand, we are currently experiencing shipping delays on some engines. We are working overtime to build our engines and fulfill our customer orders as soon as possible. We strongly encourage those wanting an S&J engine to place your order now, as we prioritize on a first come first served basis. From all of us at the shop, we THANK YOU FOR YOUR SUPPORT!

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HER-237MLB   OUR PRICE: $3909

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  • Engine Details
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From 1954
To 1977
Make Hercules
Trim --
Size(C.I/L) 237/3.9
Drive --
Note Custom build only
Core Charge 0.00


Fuel Type Gasoline
Fuel System Carbureted
Cylinders 6
Engine Type L6
Engine Size - C.I/Liters 237/3.9
Transmission Direct Drive
VIN Type N/A
Installation Instructions Installation instructions shipped with engine.
Engine Description 3.9L 237 cid, L head straight 6
Head Cast --
Block Cast --
Crank Cast --

Installation Instructions

  • Professional Installation recommended.
  • Follow prescribed break-in procedure to ensure correct bedding of components.
  • New or reconditioned ancillary components strongly recommended.
  • Receipt of installation receipt and post-installation diagnostic results are required for warranty validation.

Installation instructions shipped with engine.

Each S&J engine is delivered with prescribed break-in oil, gasket kit and warranty registration form. Follow all recommended procedures and practices. Submission of installation, diagnostic and warranty documentation required for warranty coverage.

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Year 1970
Make Hercules
Model --
Trim --
Series --
Engine Size Liters --
Drive Type --
VIN --
Engine Size CI --
Engine Model --
Fuel type primary --
Engine Cylinders --

Applications Results

From To Make Model Trim Note  
1954 1977 Hercules Marine Custom build only Select