This section describes the components required for an Inboard straight shaft installation e.g.
engine / transmission / propeller shaft / propeller.
The book Inboard Motor Installations by Glen L. Witt & Ken Hankinson
will guide you through your installation. It covers all aspects of inboard installation. It can be ordered through Glen-L's
Bookstore :
Inboard Motor Installations by Glen L. Witt & Ken Hankinson
The diagram below depicts components you'll need for a straight shaft installation :
Courtesy Glen-L Marine Designs
The Drive plate
bolts to the flywheel. Splines in the center of the plate mate with matching splines on the
transmission's input shaft. If your flywheel doesn't have any threaded holes to mount the
drive plate, a machine shop can drill and tap to suit. You can also swap it out and replace it
with a stick-shift (manual transmission) flywheel.
The Prop Shaft Flange
bolts up to your transmission's output shaft.
Related links and resources
- Marine engine and transmission specifications & suppliers.
Transmission Page
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The book Inboard Motor Installations covers all aspects of inboard installation : Engine, transmission,
gearing, and propeller selection as well as engine marinizing and marine hardware are discussed in an easy to read format.
Inboard Motor Installations by Glen L. Witt & Ken Hankinson
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Use the Glenwood Marine Parts Catalog to locate bellhousing, transmission, struts, rudders and other related parts.
Glen-L Inboard Hardware Parts Index
- Description of Inboard Marine Hardware Parts.
Description of Inboard Marine Hardware Parts
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Estimates and part numbers for typical center-mounted V6, V8 and V-drive installations
- Parts needed to convert an automotive engine for marine use.
Excerpt from Inboard Motor Installations, Chapter 3, Inboard Hardware: Marinizing the engine.
The "Marinizing" Process
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You'll find useful info in Ken Schott's marine conversion chronicled in Glen-L WebLetter # 56 :
Conversion of 3.0L Chevy inboard-outboard to a an inline inboard
- Flywheel fitment notes :
Chevy Small-Block V8 Flywheels and Flexplates - Fitment Notes
(glen-l.com)
- Velvet Drive bellhousings
To save weight, look for a cast aluminum 'compact' Velvet Drive bellhousing. It requires the installation
of a 12-3/4" 153 tooth flywheel and a marine starter to match the smaller diameter flywheel.
Velvet Drive Bellhousings
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Velvet Drive Flange Take-offs (Prop shaft flange)
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Velvet Drive Power Take-offs (For v-drive applications)
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Differences between 1310 and 1350 series flanges
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