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Craftsman Gt18 6 Speed Help Needed


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#1 fordman_19912000 OFFLINE  

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Posted April 04, 2014 - 06:19 PM

hey guys and gals im going to try to post some pics one is the fuel pump i have its a walbro pump doesnt pump i think lines are on wrong number 2 question is what years did they make this style of hood on a gt18? thanks jason.  001.JPG 004.JPG 004 - Copy.JPG   in the last pic the lines are on the pump as follows  1 is the line to carb  2 is the pulse line and 3 is to the tank   engine does run off of gravity tank wont pull fuel  thanks jason 


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#2 fordman_19912000 OFFLINE  

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Posted April 04, 2014 - 06:26 PM

oh yea i know its not the orginal engine on it the engine thats in it is  422437 1209-01  88081912  all of the parts lists show the carb with fuel pump on it mine does not have it its the same style of carb but doesnt have the pump part on it just a barb fitting in the side of it  it runs great with gravity feed so i dont want to get a different carb dont fix what aint broke lol 


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#3 Gabriel OFFLINE  

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Posted April 04, 2014 - 08:02 PM

WELCOME! It sounds like your fuel pump may be bad, since it runs by gravity feed. Have you tried switching some of the lines?


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#4 drbish ONLINE  

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Posted April 04, 2014 - 08:17 PM

It looks like the same fuel pump that is supposed to bolt up to the carb to me.I can not figure out how it works like that

http://bsintek.basco...ooACVJ1DajI.pdf



#5 KennyP ONLINE  

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Posted April 04, 2014 - 08:23 PM

:wave: Welcome to the forum! On the hood question, '81-'83. The pump may be full of crud or need rebuilt also.


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#6 fordman_19912000 OFFLINE  

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Posted April 04, 2014 - 09:45 PM

like i said the engine is not orginal i dont know what it came off of all i know its an 88 18 opposed and it runs quiet but the carb does not have the fuel pump on it the place for it is there but the line goes into a barb fitting on the side its a walbro pump i believe its a 3100 no longer made i was told i was wondering if i can put any kind of pulse pump on it or are there different pressures? it has a rear tank and doesnt run off gravity from it 



#7 tinbender7 OFFLINE  

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Posted April 04, 2014 - 10:17 PM

I am running an older GT18 with a small electric pump it was on there when I got it and seems to work fine with no problems.



#8 UncleWillie OFFLINE  

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Posted April 04, 2014 - 10:59 PM

The pump diaphragm is probably bad. n
I am not exactly sure which line goes where.

#9 KennyP ONLINE  

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Posted April 05, 2014 - 05:17 AM

Check the pump over for any numbers. We may be able to find something out that way.



#10 MH81 ONLINE  

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Posted April 05, 2014 - 06:38 AM

Try reading this thread. It covers a couple of things that might help too. http://gardentractor...ps/#entry314108

#11 fordman_19912000 OFFLINE  

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Posted April 13, 2014 - 07:16 PM

hey guys and gals i did get the pump working but the pump now leaks some not bad but it is leaking the problem was first the filter was packed with sandy dirt and second the pump was gummed up with some kind of gummy oil or maybe old gas the mower was sitting for like 4 yrs outside now comes the fun part of cleaning the tank out anyone have any tips on what to use its a plastic under seat tank was full of green gas/water lol i have laqure thinner i was gonna try but it might mess the tank up please help 


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#12 Gabriel OFFLINE  

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Posted April 13, 2014 - 08:32 PM

Can you easily remove the fuel tank? If you can, you could rinse the inside with water, then blow dry with compressed air. Other members may have a better suggestion for you.

Edited by Gabriel, April 13, 2014 - 08:33 PM.


#13 jeffy1 OFFLINE  

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Posted April 13, 2014 - 10:53 PM

I had almost the same problem I ended up replacing it with a newer pump it's round and plastic instead of rectangle and metal but it works great


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#14 MH81 ONLINE  

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Posted April 14, 2014 - 12:43 AM

Cleaning the tank, I would probably remove and rinse with water, then denatured alcohol (you can get 90% at Walgreens), then maybe gas.

#15 KennyP ONLINE  

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Posted April 14, 2014 - 05:28 AM

I have had good luck cleaning these tanks with Seafoam/gas mix, about 50/50. Put about a pint in there and slosh it around. Let it work for a day or so. sloshing every so often.


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