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Thread: Mercury Engine Issues

  1. #11
    Join Date
    Jan 2013
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    Fuquay Varina, NC
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    I'm going to remove the float switch and test it to see if it's working because a lot of stuff I've been reading points that direction. I did check all hoses for kinks and obstructions. I'll keep you posted on what I find out.

  2. #12
    Join Date
    Nov 2016
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    North Carolina
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    I had a similar issue couple years ago with an 05 115. Fuel lines were clogged bad due to ethanol fuel. Motor would idle fine and troll fine but when it hit about 3000 rpm wouldn't hardly run. Let off the throttle and it'd run fine. It was starving for fuel

  3. #13
    Join Date
    Jan 2011
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    Nawth Carolina
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    I have had a simlar problem (Johnson 90), with the extra feature of "skipping" or stuttering at around 4200 rpms. I replaced the fuel line and pumped up the bulb to find fuel squirting from around the top of the fuel air separator. Two screws had loosened about three turns! Well, I tightened (also replaced plugs ,cables, and coils). I still have this problem. Boats are such an adventure.

  4. #14
    Join Date
    Mar 2007
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    North Carolina
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    I had a similar problem on my johnson 90. After replacing a couple sensors,ect it ended up being the power pack.
    Thanks Crewmax42 thanked you for this post

  5. #15
    Join Date
    Apr 2008
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    NC
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    Did you get it fixed? Use caution when going into the float/fuel reservoir? The screws have been known to pull the threaded inserts loose. I have a 2011 115 four stroke that had similar issues. After replacing the float switch I still had issues. Turned out to be I was losing my prime by not having a hand pump that has a check valve in it. Installed a hand primer pump. Never had another issue since.
    Living in a Poorman's Paradise

  6. #16
    Join Date
    Jan 2013
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    Fuquay Varina, NC
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    I ordered the parts and they should be in first thing next week. It is my goal to change the switch next weekend. I'm really hoping that solves it but I'll keep the primer pump in mind if it doesn't.

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