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    How does Guardian Mode work?

    Thanks for the reply AllDodge. I didn't realize these motors had an In-Gear switch that limited fast idle RPM, haven't had that on any of my boats, but my newest is a 2005. I had an issue with low pressure lift fuel pump and have that fixed, as well as a bad temp sensor and that is fixed...
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    How does Guardian Mode work?

    I'm helping a friend with his 2014 Mercury 115hp EFI 4 stroke. We had a couple issues that we now have resolved, but engine acts like it's running at half power. When on the hose in the driveway, in fast idle the engine runs fine up to around 2000 rpm, then falls on it's face and won't go above...
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    2014 mercury 115hp EFI 4 stroke running rough, lack of power

    Hello. I've been troubleshooting issues with this engine, and found a problem with the low pressure fuel pump and have that fixed. On my test run the engine now has consistent supply of fuel, but is running very rough above 2000 rpm, and barely has enough power to get the boat on plane. At wide...
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    Troubleshooting Mercury 3075-28 Electric lift fuel pump issue

    Has anyone bench tested a low pressure pump? Does it run on 12v?
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    Troubleshooting Mercury 3075-28 Electric lift fuel pump issue

    I'm looking for advice to troubleshoot a 2014 mercury 115hp EFI 4 stroke. After a problem with a water pump replacement, the engine got hot. Water pump problem is now fixed and pumping water as it should. Then engine appears to be in guardian mode, limited to 2500 rpm. I bought a SmartCraft...
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