Webra Pump and Symptoms

[Rcmaster199 at aol.com]

Randy, if you have owned the engine for less that two years,  you might 
consider sending the engine back to Horizon and talk with Tom Jackson, their engine 
guy, about the symptoms. Chances are pretty good that you will get a new pump 
under warranty. The new pumps seem to work fine.

One more thing--do not overlook failed glow plugs as a source of trouble. 
They may light fine with the battery and may even start the engine. BUT..........

Assuming it was running great just a flight ago, symptoms I have seen where 
the plug goes North for the Winter are: engine sounds rich and burbles as the 
throttle is advanced. Power is down and engine sounds like it's 4 cycling rich 
at full throttle, but little smoke is exhausted; more like raw fuel coming out 
of the pipe. The needle is leaned in response and the engine runs for a bit 
and dies very hot; you can smell the sizzling oil. Then it will only run when 
the plug is lighted continuously with the battery. A few runs like that can 
kill the bearing

I use the OS type F in the Webra 145 and once replaced, needle needs to go 
back to the original settings pronto or it dies lean. 

Brian's ran with the Perry pump as well as mine does with the stock pump. He 
lost absolutely nothing with the Perry pump and stock TN carb. This is without 
a doubt an option worth much consideration if the stock pumps are giving 
trouble. Very good midrange also.

MattK

> Subj:Re: Webra Pump 
> Date:7/1/2004 2:30:39 PM Eastern Daylight Time
> From:randy10926 at comcast.net
> Reply-to:discussion at nsrca.org
> To:discussion at nsrca.org
> Sent from the Internet 
> 
> 
> 
> I just put my backup black head on the plane.  So I can either send the AAR
> in for repair, get a webra pump or get a perry pump.  Depending on the pump
> I could try an external mount.  The Perry V30 is starting to sound good.
> 
> Did you use blue locktight on the screws?  Drill center hole - what and
> where did you drill it.
> 
> I like the webra power and lightness.  I like Perry products also.
> 
> Randy
> 
> ----- Original Message ----- 
> From: "Brian Billings" <auto7832 at bellsouth.net>
> To: <discussion at nsrca.org>
> Sent: Thursday, July 01, 2004 11:00 AM
> Subject: Re: Webra Pump
> 
> 
> > I put a Perry VP30 pump on mine and ran it last Sunday, runs perfect for
> the
> > first time since owning the motor! Just removed all the original pump guts
> > from the back plate, used the two original short pump mounting screws with
> a
> > little loctite and a couple flat washers to plug off original mounting
> holes
> > in the back plate. Drill and tap center hole for pressure nipple and your
> > good to go, did not even have to adjust pressure, just fired it up, set
> the
> > needles and it runs great, actually flew four flights in a row with no
> > problems, it's a miracle!!
> >
> > Brian Billings

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040701/06ae7e49/attachment.html