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  #1  
Old July 26th, 2004, 03:20 PM
Millmaker Millmaker is offline
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Join Date: Jul 2004
Location: Norway
Posts: 13
Default Yamaha carb cleaning and adjustment

Hi! I got a 225 yamaha with 3 carbs on it,and i want to clean them totally,anyone got a tip on how to do it proper?On each carb there is 2 swrews to adjust the amount of air i think,anyone who can tell me what position they should be in?Thx,great site!
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Old July 27th, 2004, 05:08 AM
Ray Neudecker Ray Neudecker is offline
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Join Date: May 2004
Location: Jackson,TN.
Posts: 1,657
Default Re: Yamaha carb cleaning and adjustment

To do it properly, completly disassemble the carbs, soak them several hours in cleaner, clean out the cleaner and blow them dry with air through the passages and reassemble. Always replace the bowl gaskets. Don't know the model number, but on older models, 1 1/4 turns out from a soft stop. Don't forget to set the float height.
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Old July 27th, 2004, 06:19 AM
Millmaker Millmaker is offline
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Join Date: Jul 2004
Location: Norway
Posts: 13
Default Re: Yamaha carb cleaning and adjustment

Hi! Thx. What kind of cleaner is uesd for that,asked around here in Norway,but noone seems to know.....And what excactly is the float height,and what shall it be set to?Thx for a great site! Most useful and helpful!The carbs is marked with:6R 500 621400-601 How often should the fuelpumps on this motor be "serviced"? And is it enough to replace gaskets inside?
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Old July 29th, 2004, 09:41 AM
Anymec Anymec is offline
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Join Date: Jun 2001
Location: Finland
Posts: 43
Default Re: Yamaha carb cleaning and adjustment

What year is your Yamaha??Do you have type and ser.number??
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  #5  
Old July 29th, 2004, 11:49 AM
rodbolt rodbolt is offline
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Join Date: Sep 2003
Location: Kitty Hawk NC
Posts: 16,796
Default Re: Yamaha carb cleaning and adjustment

dude if you dont know how and why this carb works you may be better off allowing a professional to do it. the "air" screws just allow more or less of the air/fuel mix to pass the idle circuits. the fuel ratio is set by an idle jet in the fuel bowl. the pumps I reccomend just tossing and replacing every 3 years. good luck and keep posting
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