Honda outboards offset crankshaft design - vertical shaft

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Midpage of

http://www.temagamimarine.com/htm/hondaobm.html

shows Honda's new offset crankshaft design.

This might be useful for heli's where the crank shaft power output
bearing must take high radial loads or the second shaft itself could
be used as output.

Crankshafts able to take radial output loads are not very common
especially vertical shaft and 40 horsepower.

Comments.

[Morgans]

> wrote in message

> Midpage of
>
> http://www.temagamimarine.com/htm/hondaobm.html
>
> shows Honda's new offset crankshaft design.
>
> This might be useful for heli's where the crank shaft power output
> bearing must take high radial loads or the second shaft itself could
> be used as output.
>
> Crankshafts able to take radial output loads are not very common
> especially vertical shaft and 40 horsepower.
>
> Comments.

Outboards generally are rather heavy for their HP, and their crankcases
usually have a great deal of extra material built into them for mounting,
clutch support, transmissions, ect. It might be hard to separate the
"engine from the outboard."

People in the past have also experienced problems with cooling, when
converting outboards. The outboard always has a supply of cold water to run
through it. Cold is a relative term, but consider that a closed cooling
system may have the water enter the engine at 140 plus degrees. Water that
warm is not sufficient to cool the outboard, in most cases.
--
Jim in NC