YS .53 Issues - Please help

[Paul Reed]

Fuel leaking from the carb can be an indication that there is something
keeping the check valve open.

Paul Reed


  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Van - E-Mail LIST
  Sent: Tuesday, February 18, 2003 12:03 PM
  To: Pattern LIST; Pattern - List
  Subject: YS .53 Issues - Please help


  All,

  I purchased a used YS .53 a few weeks ago, I'm "NOT" a YS expert by any
means, but I usually get around them pretty well, I'm just having some
issues with getting her to run correctly.

  Here is my problem:

  Prime the motor until fuel comes out the carb, and "1" flip, it starts
right up. The motor runs strong for about 3 or 4 minutes, but will not idle
below about 3300 rpm, it just dies. I have seen cases when the regulator was
sticking and causing a similar problem, so I loosened the reg screw a couple
turns, and I could see fuel move through the fuel line, I would then return
the regulator screw to it's proper place, it would run about 4 minutes, and
the same thing would happen.

  I removed the regulator screw, o-ring, piston and diaphragm, they where
VERY gummy, so I cleaned them very well and re-installed. Motor runs better,
and will idle around 2500 as of now, but fuel POURS out of the carb even if
I have the throttle closed off.

  I'm using 20% Cool Power with added oil to bring the content to 20%, and
OS "Type F" plugs. APC 11x7 prop

  The motor is set at 2 1/2 turns open on the High Speed needle, and 1 turn
open on the low needle.

  The check valve I am using is from an OS 1.40, not a YS, there was no YS
valve with this engine.

  Questions:

  1 - Why the fuel pouring out of the carb ?
  2 - How do I get the idle better adjusted.
  3 - Should any further cleaning be done to the engine ?

  Much thanks !

  ________________________________________
  Van Flowers
  NSRCA "K-Factor" Advertising Manager
  AMA 6216,  NSRCA 2778
  813-784-3794
  extra330 at tampabay.rr.com
  www.nsrca.org





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