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1999 yamaha ox 250 efi on 30 foot grady

foxdungeon

New member
hi - this is my first post , so I'm hoping for some advice

hang trouble with one engine ; starts fine , idles fine , can run up to 1600 rpms, when throttling up or at 3000 and above rpm engine cuts out and stalls.
I have replaced /fuel water racors / vst filter / in line fuel filters/ o2 sensor .
any advice ? any one know of any good outboard techs in the staten island area NYC?
 
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