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  #1  
Old 08-17-2013, 08:27 PM
Larry Jones Larry Jones is offline
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Default engine racing plus bogs down

Went out for a ride early this afternoon and the engine was idling smoothly. Took it out tonight drove about 4 miles as coming home the engine started to race plus when I wanted to use the passing gear it started to hesitate on me. Like the carb wasn't getting enough gas.This has never happened bebore.I will check the spark plug wires tomorrow. What else would I need to check. AS I said first time for this problem. It will drive smoothly under 40 miles hour. But it started to race on me coming home up to then everything was fine. Thanks Larry
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  #2  
Old 08-17-2013, 09:43 PM
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Check the secondary diaphragm in the carburetor. The rear throttle plates might be sticking open.

John
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  #3  
Old 08-18-2013, 05:51 AM
Larry Jones Larry Jones is offline
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Default checking the carb

By removing the air cleaner would I be able to physically observe those plates sticking. The diaphragm is that part deeper into the carberator which Iwouldnt be able to observe. PLus would some carb cleaner down into the throat solve my problem. Thank you again for addressing this problem. John. Would I be able to shoot some cleaner through the front carburetor idling screws without damaging anything.
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Old 08-18-2013, 10:03 AM
Larry Jones Larry Jones is offline
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Default got my manual out

hi John.

it looks to me there our 4 screws holdind the cover plate along with a return spring and then the secondary operating diaphragm. If I shot some gumout through the opening would that solve anything or maybe I would have to adjust the fast idle adjustment screw too. I don't want to get over my head with this. Larry
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Old 08-18-2013, 11:45 AM
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If the diaphragm is torn shooting gumout isn't going to help it. Open the throttle all the way and then move the secondary lever back and forth and look down the carburetor and see if the rear throttle plates close all the way.

John
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  #6  
Old 08-18-2013, 12:12 PM
Larry Jones Larry Jones is offline
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Default throttle plate

going away today But did start the engine earlier this morning idled smoothly. Will get to it later today. Larry Thanks John
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  #7  
Old 08-18-2013, 07:02 PM
Larry Jones Larry Jones is offline
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Default moving secondary lever

I did what you said. Moving the secondary lever did closed all the way. But the plates looked alittle gooped up. Would you advise alittle gumout on the top plates I would have to get my small finger to get under the bottom plates. What would you advise mre to do. Larry
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  #8  
Old 08-18-2013, 07:35 PM
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Some Gumout on the plates won't hurt. Spray it on top of the plates and open them up and spray it on the bores. Use as much as you want then let it dry. You need to make sure the rear throttle plates close completely or the engine will race.

John
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  #9  
Old 08-18-2013, 07:45 PM
Larry Jones Larry Jones is offline
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Default explain the bores

I didn't quit understand the bores. Can you give me a physical description of the bores. New territory for me John.
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  #10  
Old 08-18-2013, 08:05 PM
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The bores are the round parts of the carburetor that the throttle plates close against. The shop manual calls them barrels. I've always called them bores.

John
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