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Discussion Starter · #1 ·
would any one know why the previous owner of this machine has changed the main jet to match a 583 engine??? My shop manual shows it should be 310 on both pto/mag he has it set smaller 280/260......., also has the air jet left out. could this be way he has down sized??? the other jets, slide, needle are factory setting.
any ideas would be great!!!
 

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steely said:
would any one know why the previous owner of this machine has changed the main jet to match a 583 engine??? My shop manual shows it should be 310 on both pto/mag he has it set smaller 280/260......., also has the air jet left out. could this be way he has down sized??? the other jets, slide, needle are factory setting.
any ideas would be great!!!
[snapback]754072[/snapback]​
I have my 670, 300 pto and 280 mag side and the air screw should be at around 2 turns out.
 
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