1971 Mercury Fuel Line Replacement

Discussion in 'Outboards' started by Brian Baker, Jul 30, 2021 at 10:18 PM.

  1. Brian Baker
    Joined: Yesterday
    Posts: 1
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    Location: Antioch IL

    Brian Baker New Member

    Hello, new to this forum. I recently began a rebuild on a 1971 Mercury 1150 Inline 6. I am looking at replacing the fuel lines. The current lines are all 1/4" , connections are with crimped fittings on the fuel lines and a 3/8" brass threaded fitting going to the fuel pumps and carbs. These fittings are not reusable, and locally I have found fittings with a 1/4" barb and the proper thread so I can make my own. However, a quick look shows the opening of these fittings is definitely smaller than the current fittings.

    My question is, should I use these fittings, or go to a larger size? I am concerned the engine could starve for fuel. I could use a larger fuel line and fittings though; I'm thinking the intake on the carbs will restrict it to the same flow it has now. I just want to make sure it's getting enough gas, but I don't want it flooding either.
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