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Old 09-09-2013, 11:51 AM   post #1 of 18
Hicks
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Default convert to electric fuel pump

i have a m&w zero turn with a kohler magnum 18 horse twin that i would like to change over to an electric fuel pump instead of the mechanical one. i was wondering how many psi the electric pump should be. i would think the smallest psi pump should work but would like some imput on the subject, thanks.
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1964 wagner little giant
1965 national ride on reel mower
1990`s lgt 18h ford
1970`s lgt 145 ford
424 dixon zeeter 424
very old home made tractor
massey fergusen 50c diesel fel
and im shure theres something else im forgetting
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Old 09-09-2013, 05:28 PM   post #2 of 18
WattonYooper
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Default Re: convert to electric fuel pump

I put electric fuel pumps on 2 of my Onan power machines. Used 3.5/4 pound pressure pumps.

Ted
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Old 09-09-2013, 07:16 PM   post #3 of 18
Hicks
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Default Re: convert to electric fuel pump

thanks, i didnt think i would take a big pump since alot are gravity fed.
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Hicks




1964 wagner little giant
1965 national ride on reel mower
1990`s lgt 18h ford
1970`s lgt 145 ford
424 dixon zeeter 424
very old home made tractor
massey fergusen 50c diesel fel
and im shure theres something else im forgetting
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Old 09-09-2013, 07:38 PM   post #4 of 18
Cannon51
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Default Re: convert to electric fuel pump

How much power does it use and does your motor make enough power (electric) to add it?
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Old 09-09-2013, 07:45 PM   post #5 of 18
WattonYooper
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Default Re: convert to electric fuel pump

If it is gravity feed you don't need a fuel pump. My cub cadet has a K301 and the tank is mounted above the carb, no fuel pump needed.

I never had a problem with the electrical source, both have 15amp charging systems.
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Old 09-09-2013, 09:27 PM   post #6 of 18
Hicks
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Default Re: convert to electric fuel pump

this machine is not gravity fed. the kohler fuel pump went out. i can get an electric pump cheaper than the factory kohler pump. as far as the charging system goes it should be fine.
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1964 wagner little giant
1965 national ride on reel mower
1990`s lgt 18h ford
1970`s lgt 145 ford
424 dixon zeeter 424
very old home made tractor
massey fergusen 50c diesel fel
and im shure theres something else im forgetting
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Old 09-09-2013, 11:36 PM   post #7 of 18
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Default Re: convert to electric fuel pump

You wont need much more than 1.5 lbs to run that engine fine,there are some 1.5 to 3 lb pumps available that have very low amp draw..
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Old 09-10-2013, 09:13 AM   post #8 of 18
38racing
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Default Re: convert to electric fuel pump

Not sure if this forum or another that had thread on pumps. electric needs to shutoff if engine should stop running for any reason or it will keep pumping fuel?
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Old 09-10-2013, 10:11 AM   post #9 of 18
Hicks
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Default Re: convert to electric fuel pump

1.5 is what i was originaly planning on getting for it. My thoughts were if a gravity feed system works fine , then the smallest psi pump should be more than enough. napa has a 1.5 for $55 the kohler pump is $86. thanks for the input guys!
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1964 wagner little giant
1965 national ride on reel mower
1990`s lgt 18h ford
1970`s lgt 145 ford
424 dixon zeeter 424
very old home made tractor
massey fergusen 50c diesel fel
and im shure theres something else im forgetting
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Old 09-10-2013, 01:45 PM   post #10 of 18
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Default Re: convert to electric fuel pump

I'd think a 1.5 would be fine. Be aware of the different filters as some will need higher pressure to flow. Likely a difference without distinction, I guess, but if you do have a problem, check the flow with and without filter to make sure a picky filter is not causing difficulty. Just flow into a container before the filter, and after for comparison.
Some pumps have internal switches that de-power the pump when there is no demand, applying power only when the pressure drops below a specific set-point. That saves energy, wear, and also will stop the pump in case of a roll-over or other difficulty. As long as the fuel line is intact, and the float bowl needle & seat working it will stop pumping. OTOH, flip, and the pump will continue to pump.
I would take a look at the wiring diagrams for any that have a powered pump to see if duplication of the safety switch system could be reasonably done. Definitely get a 'rollover' switch from a junkyard for a few dollars. Who knows, it may prevent conflagration. They are mounted under the glove box, behind the top edge of the carpet/floormat on the firewall or toe-board in Ranger trucks, and should work fine for your application. Cheap protection.
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Old 09-10-2013, 03:15 PM   post #11 of 18
rgoers
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Default Re: convert to electric fuel pump

Quote:
Originally Posted by Hicks View Post
this machine is not gravity fed. the kohler fuel pump went out. i can get an electric pump cheaper than the factory kohler pump. as far as the charging system goes it should be fine.
You can buy genuine Mikuni mechanical fuel pumps for very little money. I think the last one I replaced on one of my snowmobiles was well under $20, and far less than the rebuild kit Polaris sells.

What exactly happened to your pump? There isn't much that can go wrong, besides the diaphragm leaking. Almost all of them can be rebuilt too...
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Old 09-10-2013, 10:53 PM   post #12 of 18
Hicks
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Default Re: convert to electric fuel pump

the current kohler pump quit working, diaphrams are bad. you used to be able to get a rebuild kit for them but now they quit making rebuild kits. you have to buy a whole complete pump, $86. plus the m&w machine has to be torn apart as the engine is under the seat. big pain. I just bought the 1.5 to 4 psi electric pump, and four feet of fuel line and four clamps for $54. gonna start on it soon I hope. also the new electric pump came with its own filter that screws in the (in side) of the pump so I shouldn't have to worry about filters. hope it all goes good.
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1964 wagner little giant
1965 national ride on reel mower
1990`s lgt 18h ford
1970`s lgt 145 ford
424 dixon zeeter 424
very old home made tractor
massey fergusen 50c diesel fel
and im shure theres something else im forgetting
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Old 09-11-2013, 01:16 AM   post #13 of 18
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Default Re: convert to electric fuel pump

Most car engines had the oil pressure sending unit wired up to the electruc pump so it would shut off the fuel pump with the engine off automatically,,if yours has a full pressure lube system it maybe you can wire it up in the same fashion.
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Old 09-11-2013, 04:30 AM   post #14 of 18
Cannon51
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Default Re: convert to electric fuel pump

Would this be an option? http://tewarehouse.com/22-1012
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Old 09-11-2013, 12:19 PM   post #15 of 18
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Default Re: convert to electric fuel pump

Yes it would,provided the engine has a vacuum port to hook it too,it sounds like it does if it had the old Walbro pulse pump..(kind of sucks you have to pay 8.95 to ship a 10 dollar part though--for a few bucks more you might locate an electric pump locally)..

The diaphrams seem to die early in the ethanol gas nowadays..thats why I lean toward going with an electric pump,one that has the solenoid type pump,with the nylon ball doing the pumping,not one with a diaphram to go bad eventually..
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