Fuel pressure regulator mounting position.
#1
Registered
Thread Starter
Fuel pressure regulator mounting position.
I put a fuel pressure regulator on my 383 this week. Mounted it at an angle. It's almost horizontal, with the front facing downward.
My initial pressure was correct, then it went down to 3 or 3.5 . I'm trying to set it at 6.5 psi as my carb manufacturer requires, and it was there for a time. After it ran a while it started to show lower pressure. I'm wondering if it requires mounting upright.
I have an Airtex E84389 pump that's supposed to handle the required fuel. It's made for 454 carb engines. BTW there is one 90 degree elbow in my line,right out of the pump, like Mercruiser built the 350. Maybe I should turn the pump so there's no elbow, would that help?
Are Mercruiser fuel water separators a restriction?
Starting to have my doubts. maybe I'll bite the bullet and get a high end pump.
My initial pressure was correct, then it went down to 3 or 3.5 . I'm trying to set it at 6.5 psi as my carb manufacturer requires, and it was there for a time. After it ran a while it started to show lower pressure. I'm wondering if it requires mounting upright.
I have an Airtex E84389 pump that's supposed to handle the required fuel. It's made for 454 carb engines. BTW there is one 90 degree elbow in my line,right out of the pump, like Mercruiser built the 350. Maybe I should turn the pump so there's no elbow, would that help?
Are Mercruiser fuel water separators a restriction?
Starting to have my doubts. maybe I'll bite the bullet and get a high end pump.
Last edited by NHGuy; 07-30-2017 at 05:30 PM.
#3
Registered
iTrader: (1)
Never ran a regulator different from how they are normally mounted. Doubt it would cause issues but , again, I have NO experience doing it this way.
#5
Registered
After setting it I always tap on mine a couple times to make sure it keeps the same pressure. It will do the same thing if you use it a little also. Guess the vibration helps them seat right or something.