[NSRCA-discussion] OS 140Rx pump question

[Lance Van Nostrand]

Add this advice to mine. I support this.  Magnum 15% also is fine.  I've 
tested a lot of fuels and would not put Omega through a pumped engine ever. 
CoolPower has the highest detergent factor of all the fuels I've tested so 
it is an excellent suggestion to start wtih.
--lance

----- Original Message ----- 
From: "Wayne Galligan" <wgalligan at texasairnet.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, September 24, 2006 7:51 PM
Subject: Re: [NSRCA-discussion] OS 140Rx pump question


> First thing I would do is switch over to regular Cool Power.    Omega has
> castor oil and it can gum up or varnish in the engine.  You will have a 
> bear
> of a time getting the rod to slide on the piston wrist pin because of the
> castor gumming up on the pin.  The regular Cool Power uses synthetic and
> does not gum up on any of the parts.
>
> The pipe length sounds about right.  But one inch short and it will run 
> fat
> in the midrange.  Try a little longer and switcging to Cool Power 15% or
> 20/20 blend
>
> Wayne
>
>
> ----- Original Message ----- 
> From: "John Pavlick" <jpavlick at idseng.com>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Sunday, September 24, 2006 7:49 PM
> Subject: Re: [NSRCA-discussion] OS 140Rx pump question
>
>
>> Sorry - Aeroslave pipe, APC 15.75x10 3-blade (re-pitched by Dave L.). 
>> Fuel
>> is morgan Omega 15%. The pipe is currently set at 31 3/4" straight-line
> from
>> plug center to the end of the pipe with an OS O-ring header. I know this
>> measurement only makes sense if using the same header or at least one 
>> with
>> the same total length.
>>
>> John Pavlick
>> http://www.idseng.com
>>
>>
>> > -----Original Message-----
>> > From: nsrca-discussion-bounces at lists.nsrca.org
>> > [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of
>> > Wayne Galligan
>> > Sent: Sunday, September 24, 2006 8:31 PM
>> > To: NSRCA Mailing List
>> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question
>> >
>> >
>> > John,
>> >
>> > What pipe? What fuel? What prop are you using?
>> > Lengthen your pipe till the midrange richness goes away.  My OS
>> > will do the
>> > same thing.  The needle on mine is about 3/4 turn out also .  I would
> not
>> > mess with the pump till you have tried lengthening the pipe.  This
> almost
>> > always fixes that problem.  Less load(smaller prop) on the engine
> shorten
>> > pipe, more load(larger prop)lengthen the pipe.
>> >
>> > Wayne Galligan
>> > ----- Original Message -----
>> > From: "John Pavlick" <jpavlick at idseng.com>
>> > To: "NSRCA Discussion" <nsrca-discussion at lists.nsrca.org>
>> > Sent: Sunday, September 24, 2006 12:29 AM
>> > Subject: [NSRCA-discussion] OS 140Rx pump question
>> >
>> >
>> > > I'm having some trouble with my OS 140Rx and it seems to me that 
>> > > maybe
>> > > somebody played with the pump (I bought this motor used). Here's
> what's
>> > > going on. The main needle wants to be at about 3/4 turns out. Not 
>> > > even
> a
>> > > full turn. If I open it to 1 1/4 turns it's slobbering rich. The idle
> is
>> > > rich even with the adjustment turned fully clockwise. It is
>> > flyable, but I
>> > > know something isn't right. This motor also has a dual-plug OS head. 
>> > > I
>> > have
>> > > an "F" plug in the center and an "8" in the rear. The transition 
>> > > isn't
>> > > great, especially at about 1/2 throttle. On the ground it will
> actually
>> > load
>> > > up sometimes. In the air it's not so bad but it doesn't sound
>> > right. If it
>> > > had a Perry pump I'd back off the pressure and that would
>> > probably fix it.
>> > > Like I said, I'm thinking someone played with the pump for whatever
>> > reason.
>> > > Is there any way to set it up as it was originally or do I have
>> > to send it
>> > > back to the service center?
>> > >
>> > > John Pavlick
>> > > http://www.idseng.com
>> > >
>> > > --
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