2002 J150PLSNF 20" shaft motor was purchased in the crate in 2005 with two year warranty. Got a new powerhead just one year later. A complete cleaning of carbs I found I have 36 low-speed(air orifice) jets and 62D high-speed main jets which is indicated for a J150PXSNF 25" shaft motor. Every website and microfiche I can find anywhere plus several mechanics and dealers have told me I should have 30 air and 72D mains?????? HELP???
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Thanx for the response. How in the world could that happen: someone on the production line grab the wrong set of carbs? I installed 30 on the air and ran it on the muffs this weekend, the idle after setting the fuel screws at 5 1/2 turns is just as nice as can be at 800rpm. Is 5 1/2 turns in the ballpark?
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That seems like a lot turns but need to have it in water to properly adjust.
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Now with the proper 30 air and 72D high speed jets the motor runs well but seems a little rich at idle and WOT. I believe I should take the time to adjust the fuel screws in 1/4 or 1/2 turn in at a time and test. Do the fuel screws have an affect on the high speed circuit also?? , even negligible?
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No the air screws will only effect the low speed circuit.
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