{Stus-List} Yanmar YSB12 Air Induction Tube

Captain Jake captain_jake at cox.net
Mon Jun 15 21:04:33 EDT 2009


Now that I've seen a good picture of your engine, I can understand your 
question better.  I still wouldn't hesitate to shorten than tube.  If 
you desire, you could add a heat resistant rubber extension and direct 
it where you like.  Cutting the tube might prove difficult if it is cast 
iron.  Access may be difficult, depending on your installation.


Steve Thomas wrote:
> Jake,
>  The air intake tube is made of cast iron, about 2 inches in diameter, and
> curved into a vertical semi circle that ends up facing squarely aft. There
> is no air filter and no provision for one. It always looked kind of odd to
> me, that the air flow would be turned 180 degrees like that with no
> obviously compelling  reason. I figured that it might be "tuned" for
> performance within a particular rpm range. Maybe it is just to aim the noise
> toward the stern.
>  The image in the link you provided is of a related but different engine.
> The engine in the image has a vertical cylinder, while in the "YS" series of
> engines, the cylinder is horizontal.
>  Thanks,
>          Steve
> -----Original Message-----
> From: cnc-list-bounces at cnc-list.com
> [mailto:cnc-list-bounces at cnc-list.com]On Behalf Of Captain Jake
> Sent: Sunday, June 14, 2009 5:30 PM
> To: cnc-list at cnc-list.com
> Subject: Re: {Stus-List} Yanmar YSB12 Air Induction Tube
> Steve,

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