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Idling @ 2500 RPM  Rate Topic 
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 Posted: 07-31-2007 02:12 pm
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jensen4u
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Joined: 08-25-2005
Location: Clermont, Georgia USA
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I started my JH up saturday after 5 years of storage and I can not seem to get the idle down to a resonable level. I have topped off the damper fuild and changed the bowl o-rings. Everything externally seems to be actuating properly. I do not think I need to change any settings on the carb as these settings should not have changed during the storage time and it was running fine when placed in storage. Any advice would be much appreciated.

 

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 Posted: 08-01-2007 11:36 am
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Dan (Florida)
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I think I would put a timing light on it and check to see if it was stuck on full advance. If not, put a vacuum gauge on and check for low vacuum (air leak) should be around 17". A likely spot is the distributor vacuum line.

hth  Dan

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 Posted: 08-01-2007 04:06 pm
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Brett Gibson JH5 20497
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How about the carb. butterfly's not fully closing, 5 years is enough time for them to gum up a bit, slide the piston's up and spray some cleaner in there, cant hurt.

Brett

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 Posted: 08-02-2007 01:17 am
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jensen4u
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Thanks for your replies. I looked into it further tonight and used carb cleaner as suggested and verified the vaccum advance has been disabled. Hooked a timing light up and got her set at 12^ as suggested throughout this board as I have installed pertronix conversion kit on her. She was still running fast so I looked closer at the idle screws and notice niether were touching. All of a sudden I realized that the new reusable valve/cam cover gaskets are thicker than the original. Sure enough the throttle cable was retaining tension. I adjusted this out and reset the throttle screws and bam she is idling at 8-900. She is still running a bit rough and rich as cam be so next will be to adjust and balance the carbs. I have never done this so it too will be a learning experience. Thanks again for your time and advice.

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