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butterfly valve setting


 
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Dadof9
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Joined: 30 Dec 2013
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PostPosted: Thu Jan 16, 2014 5:46 am    Post subject: butterfly valve setting Reply to specific post Reply with quote

What should be the adjustment on the butterfly valve on to20 carb?
 
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Tom H.
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PostPosted: Thu Jan 16, 2014 7:36 am    Post subject: Re: butterfly valve setting Reply to specific post Reply with quote

The adjustment should start at fully closed and then adjust the idle to about 450 rpm. There are threads for carb settings here I believe the initial settings are 7/8 turn on the idle mix screw and 1 1/4 on the power jet screw.
 
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Dadof9
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PostPosted: Thu Jan 16, 2014 8:32 am    Post subject: Re: butterfly valve setting Reply to specific post Reply with quote

Thank you I'll give it a shot when i get home thanks again
 
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John(UK)
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PostPosted: Thu Jan 23, 2014 8:44 am    Post subject: Re: butterfly valve setting Reply to specific post Reply with quote

The settings Tom has given are correct to set it initially, but you may find that you will need to open the main jet a little more for maximum power, but you will only be able to check this in the field under load. You should only set the Carburettor when the Engine is at working temperature, the tractor must have been running at least 15 - 20 mins, failure to do this will cause the settings to change when it does finally get hot. You MUST run the engine less than 400 rpm when you try to adjust the slow running, if you run it faster it will not adjust as it will still be running on the Main Jet....John(UK)....fergusontractors@hotmail.com
 
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