I have not removed the brass plugs covering the pilot mixture screws. I
thought they were idle mixture and didn't realize they played a part to the
off idle pilot circuit. I feel confident that by blowing them clean this
will resolve my problem. I'll let you know. Thanks, you probable saved me
the labor of tearing them completely apart again..
>From: "TC" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: V-MAX TECH LIST <[EMAIL PROTECTED]>
>Subject: Re: V-Max Carb trouble? Surges, misses and popps.
>Date: Mon, 3 Apr 2000 19:19:52 -0700
>
>Louis,
>The pilot fuel jet, (that you cleaned in the fuel bowl), passes fuel
>of course that mixes with air from two different pilot air jets,
>(obviously not all carbs have double pilot air jets). The primary
>pilot air jet is at the top of the carb, (this is the big one up
>there). The secondary pilot air jet is located behind the slide
>rubbers at the one o'clock position. The air that passes through the
>secondary gets blocked off on deceleration, (to richen the mixture and
>prevent backfires etc).
>
>Most importantly though ... the ultimate pilot mixture is introduced
>via the pilot mixture screw hole when the plates are closed and as you
>open the throttle you draw additional pilot mixture through three
>bypass holes that are located just above the throttle plates. If you
>opened the throttle plates a little when you were cleaning you would
>have noticed a "V" discoloration down the side of the barrel of the
>carb, (that you couldn't clean off) ... coming from these bypass holes
>... this is what you are running on most of the time and if they are
>plugged they will cause the symptoms you have described. Actually, if
>you look at the size of the "V" pattern on each carb when you have
>them off ... you can tell if someone has been asleep and not
>contributing.
>
>What I am suggesting that you do, (and on a routine maintenance
>basis), is to remove the pilot mixture screw on each carb ... If you
>have not had this out before it is behind a metal plug .. just below
>the slide cover ... You can use a small drill ... 1/8 or 3/16 or
>thereabouts and they will come right out ...(then you can put a 1/4
>inch plastic plug from the hardware store back in there). Also .. if
>you haven't had these mixture screws out before ... turn them all the
>way in to determine where they were set before removing them, (so you
>can put them back the same way ... or the same way "plus" an
>additional 1/2 turn). Take them all the way out and using a rubber
>blow gun tip ... pressurize the 1/4 inch hole that the mixture screws
>sit in ...... Putting air here will be sufficient to clear the mixture
>screw hole and the three bypass holes, (that are on the same circuit
>... but simply don't have a screw to adjust their flow .. and of
>course they don't need one since nothing happens to them with the
>throttle plates closed). If you get these paths clear ... I think you
>will restore the low end responsiveness ........ These clog very
>easily ... and some people with jet kits are running with their
>needles extremely high anyhow and as soon as the plates start to open
>they are really running on fuel escaping around the slide needles and
>the bypass holes aren't doing anything ... which makes for the
>occasional backfire when you crank on the throttle and general poor
>low end responsiveness.
>
>If you are able to unscrew the pilot mixture screws but are unable to
>get them out ... you can use a piece of 1/4 inch clear plastic tubing
>... just push it in the hole ... and it will slide over the end of the
>mixture screw so that you can pull it out. If this doesn't work ...
>put your safety glasses on and put a blast of air in the primary pilot
>air jet at the top of the carb ... be sure to have your hand in front
>of the mixture screw hole when you do this as they will be ejected at
>high velocity, (you need a rag on the top of the carb too ... since
>you are likely to get a shot of fuel straight up in the air ... from
>the bypass holes that are on top of the throttle plates ..... ).......
>campbell
>
>----- Original Message -----
>From: louis churukian <[EMAIL PROTECTED]>
>Subject: Re: V-Max Carb trouble? Surges, misses and popps.
>
>
> > TC: You mention two pilot air jets. I only recall one brass jet
>and an air
> > jet at the top of each carb. Which pilot mixture screw are you
>referring to
> > remove and blow air thru?
>
>
>.............................................
>To unsubscribe go to http://www.sayegh.org/unsubscribe.htm
>.............................................
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
.............................................
To unsubscribe go to http://www.sayegh.org/unsubscribe.htm
.............................................
