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  1. #1
    CAPT John's Avatar
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    FS120 Surpass III Question

    Bax,
    I am having problems with my FS1200 Surpass III engine and could use your sage advice. The engine is well broken in and had been a real trooper until this season. I now cannot get it tuned to reach a reasonable, steady RPM. I am having to run it leaned to about 1 turn out from closed on the hi speed needle and it surges while running at all throttle settings. I also have notice fuel spraying out of the carb. I've replaced the glow plug with a new Type F and reset the low end to the factory 2.5 turns from closed with no improvement. I'm thinking I may have a carb regulator problem. Is there any other troubleshooting you recommend to identify the problem?
    Thanks,
    John
    \"Sweet dreams and flying machines in pieces on the ground.\"

  2. #2
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    RE: FS120 Surpass III Question

    It could be the regulator, but we'd need to see the engine to be sure. Try running several tanks' worth of fuel through the engine first. Older versions would have the diaphragm stiffen after not being used for a while. It would take severa tanks' worth of fuel to get them working properly again. Just run the engine at full throttle with some changes now and again.
    Bill Baxter, Manager Hobby Services/Futaba Service/North America
    3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
    Service Phone: 217 398-0007
    Email: hobbyservices@hobbico.com

  3. #3
    CAPT John's Avatar
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    RE: FS120 Surpass III Question

    Thanks Bax.
    \"Sweet dreams and flying machines in pieces on the ground.\"


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