Try adjusting the idle MIXTURE screw. it is the one with a large head and a spring under it .
if you are having problems with idle on a warm engine try screwing the screw out about 1/2 turn.
This will richen the mixture. if not try another 1/2 turn. Allways set it on a warm engine.
This can be done with the engine running BUT TAKE ALL SAFETY PRECAUTIONS!!!
screw it in until RPMS drop, then back off for best idle. You may have to reset your idle STOP srew after doing above.
Bill
From: "Hartmut Beil" <[EMAIL PROTECTED]>
Reply-To: "Hartmut Beil" <[EMAIL PROTECTED]>
To: "John Leonard" <[EMAIL PROTECTED]>,"Ercoupe Tech" <[email protected]>
Subject: Re: [COUPERS-TECH] Carb Heat Questions
Date: Mon, 13 Mar 2006 18:23:52 +0100
>----[Please read http://ercoupers.com/disclaimer.htm before
>following any advice in this forum.]----
>
>
>After checking for intake leaks, which I assume you don't have, I
>would take the carb apart and carefully check the idle circuit.
>If your carburetor is a Stromberg carb, you will have to clean the
>two holes and passages around the idle adjustment screw. Screw has
>to come off for that.
>
>Of course , this is a guess, but I am having similar problems and
>took the carb off twice already. The carb runs fine until dirt plugs
>the holes over again.
>
>Hartmut
>----- Original Message ----- From: "John Leonard"
><[EMAIL PROTECTED]>
>To: "Ercoupe Tech" <[email protected]>
>Sent: Monday, March 13, 2006 5:40 PM
>Subject: [COUPERS-TECH] Carb Heat Questions
>
>
>----[Please read http://ercoupers.com/disclaimer.htm before
>following any advice in this forum.]----
>
>
>I have a 415C. 75-12 with carb mod to 85HP. When the engine is
>cold, to start and run smooth, the carb heat must be applied at 1000
>rpm and below. What is strange is with carb heat on the engine runs
>75 rpm or so higher than with it off. After the engine warms up,
>carb heat works normally above 1000 rpm, ie, mag check. After
>flying, when on the ground and taxiing, it still behaves the same
>way, runs rough below 1000 rpm without carb heat on, and when
>activated still increases rpm slightly ?
>
>Did this before and after carb overhaul.. Anyone ever have the same
>problem? John
>==============================================================================
>To leave this forum go to: http://ercoupers.com/lists.htm
>
>
>==============================================================================
>To leave this forum go to: http://ercoupers.com/lists.htm
>
>
>
