06' Yamaha F40 TLR pilot jet question.

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Petty Officer 2nd Class
Joined
May 7, 2012
Messages
104
This motor has run poorly at low speeds since new. I am on my fourth carb tear down. I have increased the pilot jets from #38 to #40 with some improvement but starting to run bad again. Been treating the gas since day one. A year or so ago I got some input from a fellow subscriber on his success with increasing the pilot jets even higher with much success on this same motor. I would love to hear from any body with some input on this matter.
 
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