[NSRCA-discussion] YS 160 question

[Bob Lavey]

Thanks, Bob.  I'll replace that and see if it helps. 

> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf 
> Of Bob Kane
> Sent: Monday, March 01, 2010 10:41 AM
> To: General pattern discussion
> Subject: Re: [NSRCA-discussion] YS 160 question
> 
> The check valve should not rotate easily, that sounds suspect.
> 
> 
> Bob Kane
> getterflash at yahoo.com
> 
> 
> --- On Mon, 3/1/10, Bob Lavey <rjlavey at hotmail.com> wrote:
> 
> > From: Bob Lavey <rjlavey at hotmail.com>
> > Subject: [NSRCA-discussion] YS 160 question
> > To: "'General pattern discussion'" 
> <nsrca-discussion at lists.nsrca.org>
> > Date: Monday, March 1, 2010, 7:16 AM
> > 
> > 
> > 
> >  
> >  
> > YS 160 question
> > 
> >  
> > 
> > 
> > Greetings,
> > 
> > 
> > I have a question about the
> > YS 160 in my Abbra.  I've got about two dozen flights on the 
> > plane/engine, since I bought it (used).
> > It's run great up until yesterday, when I barely got one 
> flight on it.  
> > I got as far as the square loop in the intermediate sequence (yeah, 
> > first maneuver), and it sputtered and choked at the top of the 
> > vertical line and across the inverted horizontal top line.  
> I rolled 
> > it over, and it seemed okay, so I tried again.  Same 
> result.  I got it 
> > back down without incident and ran the engine on the bench, 
> and it was 
> > lean in the mid-range and top end.  It got very hot during 
> the short 
> > time I ran it on the bench, and it seemed to get leaner the 
> longer it 
> > ran.  I tried the high-end needle and small rich adjustment on the 
> > pump, but neither helped.  It ran great last weekend, so I 
> don't think 
> > it was a mixture setting.  I then started checking the fuel 
> lines and 
> > vent lines, but they seemed okay.  Then I noticed the check 
> valve on 
> > the head would rotate.  The one on my other 160 doesn't rotate, and 
> > since I thought those were a press-fit, it doesn't seem 
> like it ought 
> > to rotate.  I gave it a gentle tug, and it didn't come out of the 
> > head, but it rotates pretty freely.
> > 
> > Is that a bad thing?
> > Or should I continue looking for an air leak in other places?  Any 
> > other suggestions?
> > 
> > 
> > Does that check valve just
> > pull off, and I can I replace it by just pushing another 
> one on?  Can 
> > it be that easy? :)
> > 
> > 
> > 
> > Thanks!
> > 
> > Bob
> > 
> > 
> >  
> > 
> > -----Inline Attachment Follows-----
> > 
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> 
>       
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