Fuel line and pressure question 54 Mercury

[Bob from Northport]

What size fuel line would have been used on a 54 Mercury 2546 engine??
For those running an electric fuel pump, what pressure should it run at??
Do you have installed a pressure gauge?? What types pumps/gauges??

Thanks!!

[fordor41]

our '41 with a 302 & elect. pump and our '60 with a 292 & mech. pump both have 5/16" fuel lines. The elect pump was a universal 12V pump from local auto parts store.I set the elect. pump at about 3.5# and used a combo vac/ fuel pump gauge I bought at sears 50 yrs ago.
I know mine are not '54's but should give you an idea.

[wellcraft17]

Originally Posted by fordor41

our '41 with a 302 & elect. pump and our '60 with a 292 & mech. pump both have 5/16" fuel lines. The elect pump was a universal 12V pump from local auto parts store.I set the elect. pump at about 3.5# and used a combo vac/ fuel pump gauge I bought at sears 50 yrs ago.
I know mine are not '54's but should give you an idea.

What carb are you using?

[wellcraft17]

Originally Posted by wellcraft17

What carb are you using?

I’ve got a 56 f100 with a Holley 94-2110 carb on a 292 engine. 12V facet # FEP304SV electric fuel pump that list output pressure at 1.5 - 2.5 lbs. With engine running I’m getting 1.5 psi on my 1 5/8” oil filled pressure gauge that’s inline of my 5/16” fuel line. The 94 carbs need very low fuel pressure to operate properly and not flood out particularly due to high heat during the summer months. Float setting is also a sensitive issue, mine is a hair below 1.5”

[Bob from Northport]

The carburetor in the mercury is the original Tpot 4 barrel carb that came on the engine. The manual says recommended fuel pressure is 4-5psi. Someone installed an electric pump on the car, but I think it is over powering the carb with pressure. I'm looking for an original mechanical pump

[paul2748]

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I have a 54 Mechanical pump . It is used and should be rebuilt. 40.00 plus shipping. PM me if interested.


Or I can have it professionally rebuilt for you. 200.00 plus shipping. Wait time approx one month. I will require a 50.00 deposit.

[fordor41]

Originally Posted by wellcraft17

What carb are you using?

Ford 2100 2 BRL. PSI over about 3.5# and pressure would overcome the float. used an Offenhauser fuel reg.

[paul2748]

Bob - pics of the pump I have

[Bob from Northport]

Are there vacuum ports on this pump?

[paul2748]

Yes - you can see them at the lower right parts of the pump - looking directly into them

Originally Posted by Bob from Northport

Are there vacuum ports on this pump?

[Bob from Northport]

Check your messages

[scicala]

Originally Posted by Bob from Northport

Are there vacuum ports on this pump?

For some reason, '54 Mercury's only had the vacuum pump on the bottom of the dual action pump.
All other year V8's including Mercury had the vacuum pump on top of the pump.

Sal

[Gene F]

Originally Posted by wellcraft17

I’ve got a 56 f100 with a Holley 94-2110 carb on a 292 engine. 12V facet # FEP304SV electric fuel pump that list output pressure at 1.5 - 2.5 lbs. With engine running I’m getting 1.5 psi on my 1 5/8” oil filled pressure gauge that’s inline of my 5/16” fuel line. The 94 carbs need very low fuel pressure to operate properly and not flood out particularly due to high heat during the summer months. Float setting is also a sensitive issue, mine is a hair below 1.5”

I noticed today when I had the hood up on my car (292 with Holley 94s) the pressure is up a little, and I can't get it down. Still runs fine though. Guess it is time for new one. I think I'll try the Mr. Gasket one this time. I wonder if they are all the same though.

[paul2748]

Here are a couple more pics. The fist shows the fuel in/out at the top of the pump and one vacuum port at the bottom. The second shows the vacuum port on the other side. I sent you a PM on shipping

[paul2748]

Most of the new pumps today are made in china and are terrible. Original pumps rebuilt are the best way to go. 54 pumps are rare as hen's teeth.

Originally Posted by StringyShark870

Are aftermarket’s any good?