Electric Fuel Pump Question(s).

[sschefer]

I've been searching all over and can't find anyone that makes an electric puller fuel pump. Traditionally, they've always been pushers. I was hoping that by now, someone had made a decent puller for us boaters with below deck fuel tanks.

I've run Aeromotive's and Holley's. Either works fine but in my little tiny pee sized brain, I know it's not right and it's buggin me. If I can't find a puller I'll probably put a 1 gal above deck surge tank in.

So the big "Q" is... does anyone know who makes an electric, low pressure (5-7lb) high volume, (75-95 GPH) fuel pump that pulls fuel uphill?

Thanks in advance.. I know someone here has the definitive answer:cheers:.

I just hope it's not a $500.00 merc part number.:D

[sschefer]

Anybody ever use one of the Walbro's? Dry lift is up to 24" and that would solve the problem.

http://www.autoperformanceengineering.com/html/fr_pumps.html

[daveswaves]

I've been searching all over and can't find anyone that makes an electric puller fuel pump. Traditionally, they've always been pushers. I was hoping that by now, someone had made a decent puller for us boaters with below deck fuel tanks.

I've run Aeromotive's and Holley's. Either works fine but in my little tiny pee sized brain, I know it's not right and it's buggin me. If I can't find a puller I'll probably put a 1 gal above deck surge tank in.

So the big "Q" is... does anyone know who makes an electric, low pressure (5-7lb) high volume, (75-95 GPH) fuel pump that pulls fuel uphill?

Thanks in advance.. I know someone here has the definitive answer:cheers:.




I just hope it's not a $500.00 merc part number.:D
Steve. I am using a marine 12V 5 to 7 psi fuel pump on my inline 6, I do run a pressure regulator as well since 7 is too high for the carb floats. I have a below deck tank and a tall motor, never had a problem. The pump is mounted on the engine block. The squeeze bulb is still inline to prime the pump for cold starts. Pump was from NAPA pressure regulator from Summit Racing.

[sschefer]

Steve. I am using a marine 12V 5 to 7 psi fuel pump on my inline 6, I do run a pressure regulator as well since 7 is too high for the carb floats. I have a below deck tank and a tall motor, never had a problem. The pump is mounted on the engine block. The squeeze bulb is still inline to prime the pump for cold starts. Pump was from NAPA pressure regulator from Summit Racing.

I haven't had any noticible problems either but it bugs me. I think I'll order a Walbro puller and see how it works. I'd like to be able to tell folks the correct pump to get when they ask.

The price diff between the Walbro and the Holley or the Aero is nil. I talked to a few folks today that say it is the way to go for any RV, Off Road or Boat application where the attitude of the fuel tank can change unexpectedly.

[BUZZIN' DOZEN]

There is no such thing as a puller pump, basically it's just a vacuum pump. the earth's atmosphere pushes the fuel to fill the void created. if I remember right, you can only "draw" liquid 33ft. upward, but you can push as high as you have the power to do so. But I did skip "skool" a lot:D

[daveswaves]

There is no such thing as a puller pump, basically it's just a vacuum pump. the earth's atmosphere pushes the fuel to fill the void created. if I remember right, you can only "draw" liquid 33ft. upward, but you can push as high as you have the power to do so. But I did skip "skool" a lot:D:iagree:

[rockman69]

I haven't had any noticible problems either but it bugs me.

???

If its working...whats the problem? leave it alone :confused:

[sschefer]

I have my pump set up so the f/w separator is about 12" above deck then the pump is set on the deck and the output fuel line runs down to the bottom of the bilge and back up. My theory is that this will provide the needed siphon so the pump can work as a pusher. The holly has a check valve in it that keeps the line full so the siphon starts the minute the pump is turned on. I had trouble with other setups aereating the fuel but I was never sure if it was vibration at the filter or air in the lines. The setup I have now seems to pump a good solid stream.

Maybe this winter I'll put that pole locker in and when I do I'll put the fuel pump down in the bilge below the tank and be done with it. I do love having that electric pump and not ever having to squeeze a bulb.

[olmo40]

I understand what you are saying ,i have had this thought over the years as well ,In reality it makes no difference.Some push and some pull ,both with the same pump .

[sschefer]

I agree, they all pull and push. It's my understanding that the older Walbro's used a bellows that pulled fuel out of the tank. The new design does look more like one that would pull/push. Ironically, it's nearly the same design as my Aero that I think may have causing aereation, (not 100% sure), problems. My Holley is a vane style and although they say in the instructions that it will not pull fuel, it does a pretty good job of it the way I have it setup now.

[TEXAS20225]

Sounds like you have a lot of excess time to use up:D:D

[Jeff_G]

Be careful of putting your fuel line below the level of the fuel as siphoning can occur if you have a break in the line and fill your bilge with fuel.

[sschefer]

Be careful of putting your fuel line below the level of the fuel as siphoning can occur if you have a break in the line and fill your bilge with fuel.

Thanks Jeff, that is a real concern. When I was setting it up I tested for that and the check valve in the fuel pump holds all but a little bit that dribbles out. It will definitely siphon if that check valve fails. I'll add it to my routine check list.

[daveswaves]

Thanks Jeff, that is a real concern. When I was setting it up I tested for that and the check valve in the fuel pump holds all but a little bit that dribbles out. It will definitely siphon if that check valve fails. I'll add it to my routine check list.
Steve, I think this one needs more than just a check list. You cant plan for when the failure might occur (unless you are using Windows Vista). Fuel line routing and set up is covered in the coast guard regs, the fuel system must be set up so that if there is a break in the fuel line fuel flows back into the tank, not the bilge.

[powerabout]

There is no such thing as a puller pump, basically it's just a vacuum pump. the earth's atmosphere pushes the fuel to fill the void created. if I remember right, you can only "draw" liquid 33ft. upward, but you can push as high as you have the power to do so. But I did skip "skool" a lot:D
that would depend on the specifc gravity of the fluid i would have thought

[sschefer]

Steve, I think this one needs more than just a check list. You cant plan for when the failure might occur (unless you are using Windows Vista). Fuel line routing and set up is covered in the coast guard regs, the fuel system must be set up so that if there is a break in the fuel line fuel flows back into the tank, not the bilge.

I changed it last night. I ran it straight out of the pump and up to thru hull fitting.

Just got back from the lake. The old Mariner 100 ran better than ever. Of course getting rid of a cracked coil helped a lot.:D Top speed was the best ever at 46mph (gps) (stop laughing this is a Starcraft Tinny hull) with a 4 blade 14x16 Stiletto. It never double fired all day and I ran it harder than I ever have. I'm calling this engine rebuild done and putting it up on Ebay so I can go buy another fixer upper after the 2.0L is done.

[daveswaves]

[QUOTE=sschefer;1793651]I changed it last night. I ran it straight out of the pump and up to thru hull fitting.

Just got back from the lake. The old Mariner 100 ran better than ever. Of course getting rid of a cracked coil helped a lot.:D Top speed was the best ever at 46mph (gps) (stop laughing this is a Starcraft Tinny hull) with a 4 blade 14x16 Stiletto. It never double fired all day and I ran it harder than I ever have. I'm calling this engine rebuild done and putting it up on Ebay so I can go buy another fixer upper after the 2.0L is done.[/QU
Very respectable speed for 100 hp, sounds like its running finally. :cheers:

[sschefer]

[QUOTE=sschefer;1793651]I changed it last night. I ran it straight out of the pump and up to thru hull fitting.

Just got back from the lake. The old Mariner 100 ran better than ever. Of course getting rid of a cracked coil helped a lot.:D Top speed was the best ever at 46mph (gps) (stop laughing this is a Starcraft Tinny hull) with a 4 blade 14x16 Stiletto. It never double fired all day and I ran it harder than I ever have. I'm calling this engine rebuild done and putting it up on Ebay so I can go buy another fixer upper after the 2.0L is done.[/QU
Very respectable speed for 100 hp, sounds like its running finally. :cheers:

I ran the logs on the GPS last night and I'm sorry to say that 46 was a spike and the average was really more like about 43 mph.. But hey, I got to see it! 56 and airborne with the E-Tec was more exciting. I don't think it'll do as well on the heavier North River, we'll have to see next weekend if the weather clears.