Fuel System Fittings
#12
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What are you guys using on the 3/8 fittings to seal the threads in the fuel system?
I bought the new boat about a month ago and it had the holley red pump, the fuel pressure wasn't high enough, and the red pump wasn't sufficient enough on flow. So I got a whole new system with the Holley blue pump and regulator. Installed the system using all -8 AN lines and fittings, and -8 AN to 3/8 for the pump, regulator, and filter. Well my 3/8 are leaking a little at the regulator in and out. I used liquid thread sealant, and you can see little flakes of it like the fuel is eating it. A buddy of mine did both his motors about 2 months ago, and he said it leaked everywhere that liquid thread sealant was used. It works great for water fittings, and oil fittings but seems like it can't stand up to fuel. So my question is what are you guys using to keep these sealed up from leaking? Thanks for the help in advance
I bought the new boat about a month ago and it had the holley red pump, the fuel pressure wasn't high enough, and the red pump wasn't sufficient enough on flow. So I got a whole new system with the Holley blue pump and regulator. Installed the system using all -8 AN lines and fittings, and -8 AN to 3/8 for the pump, regulator, and filter. Well my 3/8 are leaking a little at the regulator in and out. I used liquid thread sealant, and you can see little flakes of it like the fuel is eating it. A buddy of mine did both his motors about 2 months ago, and he said it leaked everywhere that liquid thread sealant was used. It works great for water fittings, and oil fittings but seems like it can't stand up to fuel. So my question is what are you guys using to keep these sealed up from leaking? Thanks for the help in advance
#14
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The red pump that was on the boat was on there for 2 seasons and ran the exact same the day I took it off as the day it was put on. I just put the blue pump on last week, and I know several people running this exact same set up with great success. I am not saying parts don't fail as I know people have had them fail on them, nor am I saying the blue pump is the best thing out there, but its not going anywhere for now. I know a guy that has an aeromotive which has been in the boat for just this season, and looks like its been sitting at the bottom of a swamp for 20 years. No part is perfect
#16
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It had an electric pump on it when I bought the boat. I am sure they went with an electric set up instead of buying a new sea water pump or rebuilding it. Its a guess, as that is what alot of people do when the seals blow out of the sea water pump.
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Maybe thats why in the past month we've had about 30 threads with "fuel supply issues" and 29 of them start with " i installed some aftermarket electric fuel pumps".
No way in the world would I ditch the mechanical merc pump in favor of a holley electric, on a 525sc engine.
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I never understood that. Some guys have a proven setup that hundreds or thousands of others are running with no issues, on an expensive engine like the 525sc was in its day, but wanna install the autozone high performance special fuel pump. Theres tens of thousands of mercury engines out there running the sea pump/fuel pump deal since about 1991.
Maybe thats why in the past month we've had about 30 threads with "fuel supply issues" and 29 of them start with " i installed some aftermarket electric fuel pumps".
No way in the world would I ditch the mechanical merc pump in favor of a holley electric, on a 525sc engine.
Maybe thats why in the past month we've had about 30 threads with "fuel supply issues" and 29 of them start with " i installed some aftermarket electric fuel pumps".
No way in the world would I ditch the mechanical merc pump in favor of a holley electric, on a 525sc engine.