Fuel pump : electric vs manual

Automotive powered airboat discussion.
Keeth1123
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Fuel pump : electric vs manual

Postby Keeth1123 » Thu Jan 17, 2019 7:00 pm

Who’s running manual fuel pumps??

What’s the advantage of running an electric one vs a manual
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Re: Fuel pump : electric vs manual

Postby Hotdog » Thu Jan 17, 2019 8:20 pm

I run a small block Chevy with a Manuel pump. My idea behind it was if I sink or flip the boat it won't pump when the motor stalls. Just my thoughts, I'm sure everyone has their opinions on this

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Re: Fuel pump : electric vs manual

Postby flcracker9 » Fri Jan 18, 2019 6:48 am

Not knowing what engine you run, but for an aircraft engine, a manual pump has the advantage where if the battery or alternator takes a dump, the engine will still run if it has a manual pump (assuming said aircraft engine is equipped with mags). On a car motor, you don't have that advantage. I believe a manual pump lasts longer than an electric, and that's coming from a guy that runs an electric pump on my aircraft engine (my engine came from the factory fuel injected, so I don't have a provision for a manual pump). Electric pumps have come a long way, lots of boats run them with no issues. I do carry a spare electric pump with me, and so far in 4 years I've had my current boat, I've only used my spare to loan to others who were stranded. My old boat had both (4cyl Lycoming). I used the electric pump for starting the engine, and once started, shut the electric off and it ran off of the manual, that is the best of both worlds.
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Re: Fuel pump : electric vs manual

Postby lilly-Pad » Fri Jan 18, 2019 7:41 am

like Kevin said it probably depends on if you are running a CM or AC . on my current AC motor I am running both mechanical and electric the electric one is this case is more of a back up. Like Kevin my electric pump has not failed me in about 4 years of use.
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Re: Fuel pump : electric vs manual

Postby Keeth1123 » Fri Jan 18, 2019 10:49 am

Running automotive. Think I will stick with electrical for now.
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dodobird
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Re: Fuel pump : electric vs manual

Postby dodobird » Fri Jan 18, 2019 11:15 am

I've ran both on my sbc boats but I like the electric pump better I can shut it off n run fuel out of my carb so it's not sitting withfue in my carb for few weeks at a time when I can't ride and if ur worried about pump still pumping when something goes wrong put a pressure switch sending unit on it so if the motor goes under 5psi oil pressure it turns pump off

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Re: Fuel pump : electric vs manual

Postby dodobird » Fri Jan 18, 2019 11:19 am

And most manual pumps if the diaphragm bust it feels your motor up with fuel Holley makes a nice manual pump that won't allow real to enter the motor if diaphragm bust

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Re: Fuel pump : electric vs manual

Postby dodobird » Fri Jan 18, 2019 11:19 am

Fills*

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Re: Fuel pump : electric vs manual

Postby dodobird » Fri Jan 18, 2019 6:17 pm

Make sure u put the pump low as u can n put the water separator b4 the pump not after it I see water separator after the pumps n water gets in the vanes n pump don't last long
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Re: Fuel pump : electric vs manual

Postby Keeth1123 » Sat Jan 19, 2019 5:12 pm

I’ll have to look to see how it is routed. I can say that I can tell a difference with the new one installed. Seems to idle stronger if that makes sense.
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Re: Fuel pump : electric vs manual

Postby Phantom5 » Tue Jan 22, 2019 11:39 am

Hey.... I have an SBC 350 270hp with 600cfm Quadrajet.... what make/model flow and pressure rating for electric pump should I get? Can't run manual pump because the engine mount covers it.

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Re: Fuel pump : electric vs manual

Postby flcracker9 » Wed Jan 23, 2019 7:59 am

Phantom5 wrote:Hey.... I have an SBC 350 270hp with 600cfm Quadrajet.... what make/model flow and pressure rating for electric pump should I get? Can't run manual pump because the engine mount covers it.


I run a Facet electric pump on my aircraft boat (FEP87SV, 4.5 - 5 psi), and a Carter electric pump (P4389, 6psi) on my Son's car motor boat (383 SBC). Neither requires a regulator, both perform as they should, both have been in service for multiple years. Some like the Holley Blue, but I've never gotten much life out of them. Just remember, most electric pumps are made to push fuel, not pull it from the tank. Mount the pump as low, and as close to the tank as possible.
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Re: Fuel pump : electric vs manual

Postby Phantom5 » Thu Jan 24, 2019 8:59 am

flcracker9, ordered the Carter. What would you recommend for a water separator for car motor airboat?

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Re: Fuel pump : electric vs manual

Postby flcracker9 » Thu Jan 24, 2019 10:46 am

Phantom5 wrote:flcracker9, ordered the Carter. What would you recommend for a water separator for car motor airboat?


We just run a NAPA one on both my Son's car motor and my aircraft boat. Don't have the part number handy, but can get it if you need it?
12' Open Palm Beach, IO-0470-L 260hp, 72" NGQ

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Re: Fuel pump : electric vs manual

Postby Phantom5 » Thu Jan 24, 2019 11:19 am

Thanks, I have a good NAPA store close.


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