My 193 with a 200 EFI merc on it won't idle and when i hammer the hot foot it bogs badly untill i trim it up a little and it will start to get better (not good at all ) but eventually it just takes off like a wild banshee for some reason and runs awesome if i keep the throttle open but If i come back down out of plane we start this whole thing over again. What is causing it do not to run right. The motor sounds like a chainsaw with the brake on when i have the thottle pinned. 200 merc efi 25 tempest thanks
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