The "Harvey" FNR
A Forward, Neutral and Reverse Transmission for a
Now you can build a transmission for small motors (15 HP or
less) that will provide forward plus neutral and reverse.
It's a DIY project well within the abilities of most people.
The component parts are off-the-shelf items usually available
through local sources. A listing of the parts and where obtained
The FNR (Forward, Neutral and
Reverse) Glen-L plans are based on a system
fabricated by Porter Harvey for his Glen-L design Sweet
Caroline, and it worked great. Sure there were a few
problems, but these were quickly solved. Slight modifications of
the original were made to eliminate some machine work.
The "Harvey" FNR uses a unique
system of chains, sheaves and friction wheels to provide
forward, neutral and reverse without a clutch. Shifting from
neutral to forward or reverse is accomplished by merely moving a
lever back and forth. It's a proven simple system adaptable
for use as a standard in-line inboard or for a vee drive
installation by adding a jack shaft. The Glen-L plans show all
the details, calls out the various parts required, and carries
you through the fabrication. And the cost; a fraction of what
you'd pay for a full marine transmission.
To answer your question in advance; no, this unit isn't for
the larger motors such as those used in automobiles. It's
for smaller motors and modification to handle a larger motor is
PLANS AND PATTERNS: Complete Drawings of both an In
Line (motor ahead of the shaft log) or Vee Drive (motor aft of
the shaft log). Even a full size pattern of the Shifting Lever
and component parts is furnished. Also includes complete
instructions, Bill of Materials, and component sources.