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I Just Can't Figure It Out


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27 replies to this topic

#16 olcowhand ONLINE  

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Posted April 16, 2013 - 01:58 PM

It's funny, and not so funny......I've had screens on shutoffs clogged many times, but never thought of it during this thread.  



#17 Guest_gravely-power_*

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Posted April 16, 2013 - 02:07 PM

It's funny, and not so funny......I've had screens on shutoffs clogged many times, but never thought of it during this thread.  

Don't feel alone. It comes with, what was I going to say? Oh well.  :thumbs:


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#18 SearsYellow OFFLINE  

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Posted April 16, 2013 - 02:28 PM

ImageUploadedByTapatalk1366140496.424085.jpg

 

 

I miss her already. She went back to be with her owner :boo_hoo:


Edited by SearsYellow, April 16, 2013 - 02:29 PM.

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#19 Guest_gravely-power_*

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Posted April 16, 2013 - 02:48 PM

I'm sure I could find you one around this place.


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#20 SearsYellow OFFLINE  

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Posted April 17, 2013 - 03:24 PM

Well, it has struck again because It is still shutting off. I think I have figured out what it is and I think it has the wrong fuel pump installed.



#21 Guest_gravely-power_*

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Posted April 17, 2013 - 03:30 PM

Well, it has struck again because It is still shutting off. I think I have figured out what it is and I think it has the wrong fuel pump installed.

More crud.


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#22 boyscout862 OFFLINE  

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Posted April 17, 2013 - 08:29 PM

I agree with above. I have to suspect the owners fuel can. I worked in a shop where we sold new minibikes(45 years ago). A guy bought a new mini for his son and took it home. Next days he's back yelling that it doesn't work. I found that he had put kerosene in it. Suspect the fuel.

#23 SearsYellow OFFLINE  

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Posted April 17, 2013 - 08:37 PM

It has the wrong fuel pump in it.

 

It has this:kohlerpump.jpg

 

 

but it supposed to have this:fuel pump.jpg

 

 



#24 SearsYellow OFFLINE  

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Posted April 18, 2013 - 11:14 AM

More crud.

Well I found out something interesting about the 16g. It doesn't have a m16 or a m18 engine but it has a m20. M20 has a total different fuel pump. That means I have to buy another one. This  Gravely was probably manufactured while the plant in Clemmons, NC was shutting down (1988) and they were trying to use the inventory they had.


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#25 Rock farmer ONLINE  

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Posted April 18, 2013 - 07:48 PM

Sounds like a bad diaphram on the pump. Pumps good until it see pressure, then spills back thru a hole in the diaphram?

That's my guess!

Joe


I'm quoting myself here! But is that what it's doing? Pumping up to pressure and then blowing by? Those pumps have really different arms. Hard to believe one could replace the other? Is there gas in the oil?

Joe

#26 SearsYellow OFFLINE  

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Posted April 19, 2013 - 07:24 AM

There's no gas in the oil.

 

Yeah, it's surging. Even though it is somewhat 'gravity feed' so it feels up sooner or later anyways.



#27 boyscout862 OFFLINE  

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Posted April 19, 2013 - 08:06 AM

Did you do a flow test at the fuel pump inlet? Shut the valve at the bottom of the tank. Disconnect the inlet fuel line from the fuel pump and direct it into a clean empty can. Open the tank valve. Does the fuel flow hose full? After a few seconds, shut off the valve. Now look at the fuel in the clean can. Is the fuel clear and no water bubbles or particles? If there is junk, run it some more to flush it out. When the fuel flows freely and clear you are ready to test the pump. Reconnect the fuel line to the pump. Disconnect the line at the carb and try the test again with the engine cranking. If it flows freely you will need a pump test gauge to check the output pressure. If it works then the problem maybe the carb. Good Luck, Rick

 

BTW Is that pump rebuildable?


Edited by boyscout862, April 19, 2013 - 08:07 AM.


#28 SearsYellow OFFLINE  

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Posted April 19, 2013 - 08:28 AM

The carb has been completely rebuilt and cleaned multiple times. I can disconnect the line at the pump and it will drain all of the gas out of the tank. I did a hand test on the fuel pump and it was pumping great but developed a leak around the main seal. I think it's getting air into the fuel pump somehow. I have ordered the correct fuel pump and plan to replace it.


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