Comments on: I have a 8 HP snow blower engine that runs smoothly when fully choked, but very poorly with no/part choke? http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke Tue, 09 Feb 2010 15:56:34 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: adam/penny http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke/comment-page-1#comment-698 adam/penny Thu, 23 Jul 2009 04:52:37 +0000 http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke#comment-698 it sounds like the carb is sucking in air somehow, that's why it's not shutting off when it's full choke and is hot. it sounds like the carb is sucking in air somehow, that’s why it’s not shutting off when it’s full choke and is hot.

]]> By: GTB http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke/comment-page-1#comment-699 GTB Thu, 23 Jul 2009 04:52:37 +0000 http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke#comment-699 This is very odd. You need a fuel rich engine to start because the fuel is insufficiently volatile. As it warms the aerosol of liquid fuel vaporizes and displaces the air needed to support combustion and this is why you release the choke. Since your engine does not seem to need extra air, I wonder if you have air leaks into the fuel / air mixture between the choke and the engine itself. There has to be a way for more air to get into the combustion chamber for this to work. I suggest you regap the plug or replace and regap if it is worn, check for air leaks, change air filter (if there is one) and see if this eliminates the behavior. This is very odd. You need a fuel rich engine to start because the fuel is insufficiently volatile. As it warms the aerosol of liquid fuel vaporizes and displaces the air needed to support combustion and this is why you release the choke.

Since your engine does not seem to need extra air, I wonder if you have air leaks into the fuel / air mixture between the choke and the engine itself. There has to be a way for more air to get into the combustion chamber for this to work.

I suggest you regap the plug or replace and regap if it is worn, check for air leaks, change air filter (if there is one) and see if this eliminates the behavior.

]]> By: damo1313 http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke/comment-page-1#comment-700 damo1313 Thu, 23 Jul 2009 04:52:37 +0000 http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke#comment-700 you need to have your carburetor rebuilt. no other way. you need to have your carburetor rebuilt. no other way.

]]> By: Jim W http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke/comment-page-1#comment-701 Jim W Thu, 23 Jul 2009 04:52:37 +0000 http://www.snowblowerexpress.com/i-have-a-8-hp-snow-blower-engine-that-runs-smoothly-when-fully-choked-but-very-poorly-with-nopart-choke#comment-701 The carb is not working properly, before you do a rebuild, check the needle valve adjustment, it may be out of proper setting. Typical was 2 to 2 1/2 turns open. Then again it may not have the needle valve so it needs a rebuild. The carb is not working properly, before you do a rebuild, check the needle valve adjustment, it may be out of proper setting. Typical was 2 to 2 1/2 turns open. Then again it may not have the needle valve so it needs a rebuild.

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