[Rhodes22-list] Outboard repair question

[R22RumRunner at aol.com]

Rick,
First of all, a carburetor does not have a diaphragm. It might have a  
float bowl with a float in it, but no diaphragm. Replacing the fuel pump  
diaphragm is probably the easiest thing you can do. Simply remove the cover from  
the pump, remove the old diaphragm, install the new one and replace the 
cover.  Screwing with the idle and high speed jets is like doing brain surgery 
on  someone who simply has indigestion.
Trust me on this one. The fuel pump works off of vacuum that is created by  
the internal workings of the engine. When he said it would only run on high 
 speed (throttle wide open) I knew exactly what it was. It's sucking gas 
through  the fuel pump into the cylinders, bypassing the carb. Ta Dah!
 
Rummy
 
 
In a message dated 8/27/2009 5:17:06 P.M. Eastern Daylight Time,  
sloopblueheron at gmail.com writes:

Cool it,  Rummy.  This is a constant fuel velocity design that is running
full  out.  A simple idle control adjustment should be tried before  major
surgery.  If there is a diaphragm problem, the carburetor  diaphragm (if
there is one) is a more likely culprit with gunk holding it  down to let in
too much air. A detergent additive or a tank of high  detergent gas could
solve it.

With these engines, the  quality/stability of the engine oil is more
significant than the quality of  the gas.  I stick with OMC's products just
to be  safe.

Rick

On Thu, Aug 27, 2009 at 9:06 AM,  <R22RumRunner at aol.com> wrote:

> Rick and  Andrew,
>
> This is the last time I'm going to tell you what is  wrong. IT'S THE
> DIAPHRAGM IN THE FUEL PUMP. REPLACE  IT.
>
> Rummy
>
>
> In a message dated 8/26/2009  6:13:59 P.M. Eastern Daylight Time,
> sloopblueheron at gmail.com  writes:
>
> Andrew,
>
> This engine is a 2  stroke--generally not bothered by  old gas.
>
>  Rick
>
> On Wed, Aug 26, 2009 at 6:06 PM, Andrew Collins   <
> sailingvesselcarmen at gmail.com> wrote:
>
> >  Make sure you  have fresh, treated gas. I have a new Tohatsu 4  stroke
> > that Will not  idle if the gas is more than a couple  of weeks old
> > This gets worse  with humid weather
>  > Another symptom is loping at médium speeds I Will  get a filter  for
> > NeXT season
> > Andrew
> >
> >  Sent from  mobile device.
> >
> > On Aug 25, 2009, at  10:41 AM, atmcneil  <atmcneil at gmail.com> wrote:
>  >
> > >
> > > I have an  '94 Yachtwin  (Evinrude) 8hp outboard that has a problem.
> > > It   starts
> > > but will only run at full throttle. It won't idle  at  all.
> > >
> > > Has anyone had this problem  and how do you fix  it?
> > > --
> > > View this  message in context:
> >   
http://www.nabble.com/Outboard-repair-question-tp25135659p25135659.html
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> >  >
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