YS140L Problem

[Karl G. Mueller]

Don,

It did come out of the center of the crankshaft. The crankshafts are still
drilled as the 120AC's were for the bypass to the regulator. Now the
pressure pulse to operate the diaphragm is routed externally. I guess it
saves a bit of weight to have the crankshaft hollow even with the small
hole.
Put a few centerpunch marks on the O.D. of the plug and reinstall it.
Make sure it is tight enough and won't come loose again. If you find
your engine is running better without it, leave it out. The early versions
did not have the plug in it.


Karl G. Mueller
kgamueller at rogers.com

----- Original Message ----- 
From: "Don Ramsey" <donramsey at cox-internet.com>
To: <discussion at nsrca.org>
Sent: Tuesday, June 01, 2004 2:32 PM
Subject: YS140L Problem


> I was starting my YS140L yesterday and heard a clunk.  When I opened the
> back plate there as a brass fitting loose in the rear chamber under the
> piston.  It's about 3/8 in long by 3/16 diameter.  It appeared to be a
press
> fit into something.  It does fit in the center hole in the crankshaft.
This
> is a large piece and couldn't have come from many places.  I reassembled
the
> engine and it ran about 400 RPM more than before but leaked fuel through
the
> carb on shutdown.  Anyone know what or where this piece was and what it
> does?  I don't even know what part to replace.
>
> Don
>
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