YS 61 Long Stroke "need more help"

[Bill Carpenter]

If I were you I'd send the engine to YS and have them figure out what's 
wrong and repair it.  It sounds like something is open when it should be
closed allowing fuel to enter the engine.  I don't think any adjustment you
can make will stop that.  There should be no leaks with pressure in the tank
and the engine not running.  Maybe a drip every now and then, but certainly
not what you're describing.
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From: <jed241 at msn.com>
To: <discussion at nsrca.org>
Subject: Re: YS 61 Long Stroke "need more help"
Date: Mon, Jun 30, 2003, 8:01 PM


I need to correct a statement....

"In talking with Richard from YS Performance, it **shouldn't** be leaking at
all when set up properly. But I didn't talk to him about this kind of
adjustment."

Sorry for the error...

See ya,

Larry
----- Original Message -----
From: jed241 at msn.com <mailto:jed241 at msn.com>
To: NSRCA <mailto:discussion at nsrca.org>
Sent: Monday, June 30, 2003 7:55 PM
Subject: YS 61 Long Stroke "need more help"

As some of you may recall, I've been fighting this YS 61LS for about 6
months. For the last month, I've been able to get it started once and then
it would flood, with a river of fuel gushing out of the carb. Verne was
actually able to work with me and we got it started a few times in Dayton.
Using the same procedure he talked me through, it gushed again and flooded
like it just fills up the cylinder when I tried at home....

Before I burn this engine up, I want to explain what I did as an experiment
and I'm considering running it to see if it will run with out burning up at
the low end.

With the engine removed from the plane, I replaced all O-rings and gaskets.
Still leaks like it bleeding from an artery. I decided to connect a pressure
gauge and pressurize the fuel inlet and see if I could adjust the regulator
to keep it from leaking.

Pressurized to 6psi. It finally stopped leaking at 1-1/4 turns in from
flush. Seems that it doesn't leak with the throttle wide open either. If I
back it off 1/8 turn, it starts to leak regardless of throttle position.

In talking with Richard from YS Performance, it should be leaking at all
when set up properly. But I didn't talk to him about this kind of
adjustment.

Question of the day...Since the regulator screw just so happens to adjust
the low end mixture as well, will I burn up the engine because it could be
too lean? Is it more likely that I have a damaged seat for the seal thus
leaking by at the "Normal" position of flush?

I couldn't see any damage, but this is the only possible conclusion I can
make at this point with the results of my bench work.

Larry

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