3184 alternative fuel pump..

1713 Views 6 Replies 4 Participants Last post by ngzcaz, Nov 4, 2015

ngzcaz

Discussion Starter · Oct 31, 2015

The 3184 has a mechanical fuel pump. Mine is cracked on top and seeping gas. You can't just buy the pump ( at least I can't find one ) w/out replacing the larger valve cover as well. Its over $ 100 to replace plus the design is such if it leaks on the inside of the valve cover as well, gas will mix with the oil causing an engine failure. I bought a Mr. Gasket 42S low psi electric fuel pump but have not run it as yet. I was simply going to bypass the mechanical pump and use a filter on the inlet and outlet side of the pump. This pump operates at 2.5 to 4 psi. By chance I saw a post this morning by someone who may know a whole lot more than I do stating very flatly DO NOT USE AN ELECTRIC PUMP in a mechanical type setup. ??

Obviously I would plug, by pass and leave in place the existing pump... or will that cause a problem since its mechanical mechanism will still be trying to pump ? ... should I leave the inlet and outlet open and maybe put a small filter on each end so it can breathe ? Now I'm thinking I want to wait and explore this further.

I guess the best answer would be if someone has a 3184 or one with the mechanical pump that has actually done this..

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Doolie

· #2 · Nov 1, 2015

I can see no problem with with using an electric pump instead of mechanical , after all it's been done in automotive applications since cavemen pedalled their cars lol . I would be inclined to remove the workings of said mechanical pump or removing it and installing a blanking plate, but then if I had a valve cover from the other side and they fit , that would be even better

. Just as long as you have it wired to the ignition , and instal a fuse in the wire , and if you really want to get carried away , a relay aswell , I see no problem.

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ngzcaz

Discussion Starter · #3 · Nov 1, 2015

I agree, removing the moving innards of the mechanical pump would be the best route to go albeit more time spent on an already long project. ( I removed the deck and used the existing hydraulic lines to hook on a couple of hoses and fittings to a blade and pump assembly I bought secondhand. Works perfectly I might add )

I sent a reply to the person who was adamantly opposed to it but so far haven't received a response. Only problem I can see is if the pump would have too much pressure to the carb which is why I chose the 2.5 to 4 psi unit.

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CubQuest

· #4 · Nov 1, 2015

ngzcaz said:
I sent a reply to the person who was adamantly opposed to it but so far haven't received a response.

And you may never hear from him........it's been over seven years since his last post.

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ngzcaz

Discussion Starter · #5 · Nov 1, 2015

CubQuest said:
And you may never hear from him........it's been over seven years since his last post.

Good thing I wasn't holding my breath for a response :thanku:

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Whirly

· #6 · Nov 4, 2015

ngzcaz said:
I agree, removing the moving innards of the mechanical pump would be the best route to go albeit more time spent on an already long project. ( I removed the deck and used the existing hydraulic lines to hook on a couple of hoses and fittings to a blade and pump assembly I bought secondhand. Works perfectly I might add )

I sent a reply to the person who was adamantly opposed to it but so far haven't received a response. Only problem I can see is if the pump would have too much pressure to the carb which is why I chose the 2.5 to 4 psi unit.

u got the right pump installed.. there has been a bunch of these put on engines of mowers.. I also have plugged up the mechanical mounts usin 1/4 plate aluminum & a 1/8 thick cork gasket..

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ngzcaz

Discussion Starter · #7 · Nov 4, 2015

As you apparently read in the other thread, I ended up leaving the housing intact and simply running a fuel line hose from the inlet to the outlet in a loop configuration. My neighbor offered to make a plate for me with his bridgeport but if this continues to work...

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