Hercules Engine News

Hercules Model N Engines

| July/August 2002

Hercules Model N

Photo #1: An early Hercules Model N as shown in Hercules dealer literature.

Sometime in the early part of 1923, the Hercules Corporation introduced the 1-1/2 HP Model N engine. The Model N was a departure from the typical Hercules-built 1-1/2 HP engines in that it was lighter in weight than previous engines and it sold for $10 less than the previous 1-1/2 HP Hercules engines. It was also a departure from the typical 1-1/2 HP design.

The first illustration is taken from the Hercules News, a company publication Hercules sent to dealers. The illustration shows an early Model N. It has no crank handle in the flywheel, it has the one-piece side rod bracket typical of the early Wico EK trip mechanism and it has the fuel spout set forward with a 45-degree elbow to miss the flywheel. Although it can't be seen, it also has the fuel mixer that is cast integral with the head.

Photo #2: A later-style Model N showing vertical fuel spout behind the flywheel. This unit also has the more commong two-piece side rod bracket for the magneto trip.

The second illustration shows the later vertical fuel spout that sits in behind the flywheel and the cranking handle in the flywheel. You can also see the more common two-piece side rod bracket to hold the magneto trip. Note that no choke flap was used.

Photo #3: This head-on view (right) shows the side valve set up and slanted rocker arm used on the Model N.

The third illustration shows the side-by-side valve arrangement, the slanted rocker arm and the seldom-seen muffler attachment.