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    fuel tank vacum??

    i have a 18 ft. alum. columbia with a fuel tank in the floor. pushed by a 115 EFI merc.my question is how does it not create a vacum in the fuel tank when running at high speed and sucking up gas when the only vents it has are 2 ( one way vents) which are run out on port side of boat i assume...
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    115 EFI four stroke fuel pump problems ???

    have problem with 2008 115 efi four stroke at wot.(6300 rpm) starts intermitent miss, can back off to 5500 rpm and run all day without a miss. go back up to 5600/5700 and higher starts to miss again. seems to start the miss after eng. warms up. it had a ss 13.5x17 prop. when i got it. top rpm...
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    2008 merc 115 with surg and miss prob.

    hello. i have a 2008 merc. 115 XL EFI S# 1B694253. with an occasional miss. i changed plugs and low end fuel filter. no help.miss started off and on about 1 yr. ago and now getting worse.still is not a steady miss.talked to shop and they said it was probably injectors. but is it possable it...
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    top end miss

    hello i am new at working on a boat eng. could somebody please tell me what would cause a miss in the mid to top speed range.the miss is just a tap, not an rpm dropping hit. it seems to start missing after it warms up some. it started some time ago. but getting worse. i have had some 6 beep...
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