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Sears GT18 Will not start

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#1 modeladan OFFLINE  

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Posted April 23, 2015 - 11:50 AM

I have a new to me Suburben GT 18 and I can start it by primeing the carb but it will not keep running, I have narrowed it down to the vacuum fuel pump is not bring fuel up from the tank..I am trying to find this pump a gasteks but sears has discontinue stocking these parts, dose anyone have an idea, looks like it is a simple pump so I don;t know why it dose not work



#2 Bolens 1000 ONLINE  

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Posted April 23, 2015 - 12:12 PM

Welcome to GTT :wave:


I may be mistaken but didnt the GT18's use different engines? Some onan, Some Briggs, some tecumseh?


It will be easier if you post the brand and model of your engine.


If you know its the pump , most likely the thin diaphragms are worn out. With todays fuel it puts an even greater strain on these parts.

#3 bhts OFFLINE  


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Posted April 23, 2015 - 12:30 PM

Like Brian said a make of the motor would help. But I do belive you have the Onan in yours. Here is a link to the fuel pump and carb kit for the carb which I think is th DD 13 or 15 in yours. The kit has the carb and fuel pump kit in it http://bobsgardentra...570?search=onan If you have the Briggs in it then we stock that kit also.


Welcome to the site glad to have you here.

#4 Cvans ONLINE  



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Posted April 23, 2015 - 03:38 PM

Are you sure that you don't have any restrictions in the fuel system between the pump and the tank. 

#5 boyscout862 OFFLINE  

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Posted April 23, 2015 - 04:44 PM

Welcome to GTT. Good Luck, Rick

#6 Dpregs OFFLINE  

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Posted April 24, 2015 - 07:40 AM

If the vacuum line is working, and you think it is the fuel pump, you can replace it with this:  



My original fuel pump:   Walbro 3028


Replacement above works great.  You can even take this one apart to position the ports where you want them which is nice.  The holes do not line up exactly, but that is not be a problem.  The only issue is figuring out which is the vacuum line, the in and the out fuel line.