My fuel line issues are few but when I do suspect one, I replace everything from the motor to the tank. Ethanol does a job on them and I had chunks in my fuel filter on one motor. The pickup system I believe is modular and can also be replaced. O rings on old fittings should be replaced periodically as the ethanol may affect those also. I use automotive fuel line that’s rated for ethanol and had no issues in the ten years I owned my last boat. Bulbs are weird. I think everyone has had a bad turn with most every brand so buy what you think is best and keep an eye on it. My Mariner I deleted the long, old style connector and went from tank to filter to motor and lost an air leak problem in the process. Built in tank and 150 hp motor, I saw no need for fuel disconnect. Never had a water in the fuel issue so I never ran a seperator. If the motor has to be revved up to stay running, I would suspect a fuel pump diaphragm beginning to go. I have to put one in my ‘74 Evinrude 15hp for just this reason. At low rpm, like around shifting level, if left there too long it runs out of fuel. Has done this a couple of times and the motor is new to me so I will install one and put any potential problems behind me. Hope you get it figured out, please keep us posted as we all learn something along the way.
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