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Silver.Kiwi3.0 star rating
Fixed the problem
Review by Silver.Kiwi on 9 Mar 2019review stating Fixed the problem
This fixed the issues I was having with my O.S. FS120SIII engine. It could not be adjusted using the main needle valve and was running too rich with a loss of power. Closing the needle valve had no effect until it was suddenly reaching a too lean setting. No help was available from tech sources and I was left to experiment with trail and error efforts on my own. I first changed the pump with no change in performance. $80. down the drain. Then all that was left was to change the carb. This fixed the problem but I can't tell you why (I suspect the regulator) because the carb. shouldn't be disassembled by the user. I have since learned that you may purchase just the carb. body which includes the regulator. This will save you a little money on this expensive carburetor and save what other wise is probably a good running engine.
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