I have twin yamaha V6 2 troke 200hp . When my boat in the land them speed rmp to 35-40 fine . But yesterday when I bring it to water it work regular with idle speed or10-15 rmp .but trouble start when I try to speed up and both motor shutdown at 17-18 rmp . Then when them shutdown they dont want to start back . I have to wait about 30-40 minutes for them start again . But same issue when i try again at 17-18 rmp . So when I bring it back to the land and they just speed fine at 30-45 rmp Please and any idea or help .
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