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#12264133 - 05/26/17 10:34 AM 115 Mercury Fuel Line Connection Q's
huntfish45 Offline
Outdoorsman

Registered: 10/01/16
Posts: 74
Loc: Aubrey, TX
So I was trying to be proactive on my 1997 115hp Merc fuel line assembly and replace what I though could be a deteriorated line. Long story short I feel like I shouldn't have. Since then the boat acts like it is bogging down when trying to plane like it isn't getting enough fuel. If it ever does get on plane it seems to be fine. My question is the connector itself, it did not look exactly like the old, but package stated it was for Mercury, the new one has a silver ball where male end goes in, old had brass look of some sort. I don't see any fuel leaking at connection though, but could just enough air be seeping through that it is causing this issue?
Also, it doesn't really act like it wants to prime with the new bulb as well as the old did, which makes me feel again like air could be an issue. I had to pump the [censored] out of it last time while someone else turned motor over.

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#12264402 - 05/26/17 01:01 PM Re: 115 Mercury Fuel Line Connection Q's [Re: huntfish45]
huntfish45 Offline
Outdoorsman

Registered: 10/01/16
Posts: 74
Loc: Aubrey, TX
Just stumbled on this, pretty positive the line I purchased is 3/8. I just found 5/16 new line and bulb and the female connector that states it is for pre 1998 mercury engines, maybe this second round will be the trick. Only thing I really changed... Baffling how this small of an error could cause the boat to bogg down trying to plane.

''Taking into account the length of the fuel line, when trying to increase or maximize fuel flow, it might seem logical to use larger-diameter fuel line, however this may not always be true. The fuel pump on the motor is working to lift the weight of all the fuel in the line from the tank, so if you were to go from a 5/16-inch line to 3/8-inch line, you will increase the volume and the weight of the fuel in the system, and this could make the fuel pump work harder, mechanically restricting fuel flow as opposed to / by volume''

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