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Kohler Acts Likes It's Starving.


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#1 BairleaFarm OFFLINE  

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Posted November 27, 2014 - 08:22 PM

The gt14 won't run above idle. The fuel pump wasn't pumping. I swapped with a different one and it still didn't work. I rigged up a gravity feed tank and bypassed the pump. Would you assume the carb is messed up? Maybe a clogged port?

#2 LilysDad ONLINE  

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Posted November 27, 2014 - 08:26 PM

It's a definite possibility. I would use a dunk tank carb cleaner on it. There are some little passages that are hard to clean right. On the other hand it may only be the float and inlet valve. On an old carb, a rebuild is always good.



#3 lyall ONLINE  

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Posted November 27, 2014 - 08:31 PM

does the gas flow freely from the tank?

could be something in the tank.

my 110 and several of my 200 series have a strainer in the tank and after year they rust out and cause problems.

I remove all of they a put a in line filter on them.


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#4 superaben OFFLINE  

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Posted November 27, 2014 - 09:19 PM

I suspect either a fuel supply issue or possibly a dirty set of points.  Kohlers will idle all day long as smooth as you want with dirty points, but they will not run above it.

 

Ben W.


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#5 MH81 ONLINE  

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Posted November 27, 2014 - 09:47 PM

So, it won't pump gas with either pump? It also won't run right with gravity feed?
I would follow Ben's advice, but if not bad points, would a severe vacuum loss / air leak meet these criteria? I believe the pumps are vacuum???

#6 BairleaFarm OFFLINE  

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Posted November 27, 2014 - 10:34 PM

If I pressurized the tank it will rev up as it should. I tried two different tanks. The fuel pump wasn't pumping. I've had issues so I don't think trust the new pump.

#7 MH81 ONLINE  

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Posted November 27, 2014 - 10:48 PM

Wait, the gravity feed wasn't ok, but increase atmosphere and it worked?
Have you taken the bowl off yet?

#8 KennyP ONLINE  

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Posted November 27, 2014 - 10:55 PM

Doesn't this fuel pump work off the camshaft?


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#9 MH81 ONLINE  

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Posted November 27, 2014 - 10:59 PM

Doesn't this fuel pump work off the camshaft?


I was hoping someone knew.

#10 KennyP ONLINE  

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Posted November 27, 2014 - 11:02 PM

I opened the parts manual! :smilewink:


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#11 EricFromPa ONLINE  

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Posted November 28, 2014 - 01:07 AM

Came Lobe worn a bit?

 

 

I had one act really strange once and thought that the pump was weak But the main jet had come loose and backed down out and was closing off the fuel.I would adjust it and it would back down after a minute or 2 of running.Also had 1 that someone had used Silicon on to seal the gaskets on the pump and well you know Gas and Silicon makes a heck of a mess of a carb.It swells up and fills all the little holes with slimey gunk.

 

 

A small piece of Leaf or grass stuck in the Needle valve will stop fuel flow so will a collapsed fuel hose.Also those clear paper element filters will get hard after a while and stop fuel flow.Had that happen Alot over the last couple of years.I use either those cheap flat Red Briggs filters or Small metal automotive grade fuel filters.I've had to change out dozens of the paper element filters over the past couple years.You can't get fuel pressure through them if they are constricted.And Ethanol does alot of funky stuff to older rubber and paper stuffs.

 

Dump some Ethanol fuel on a paper towel then let it dry then try to pore gas through it.It will flow but you'll notice that it doesn't flow through nearly as well as it 1st did.  

 

Did you Try bypassing the filter and check to see if the fuel line may have collapsed? Fuel line will feel spongy if it has collapsed.

Ethanol will eat up the older Fuel lines up after only a couple of years.It turns the core into a nasty thick tar like substance.

I swapped all the Fuel hoses out on my junk with Blue Motosports type Tygon fuel hose from our local Suzuki dealer.It does shrink around 1-1 1/2 inches for every foot till it sets up then it will get slightly rigid but it won't collapse or split out.I put it on the Cub Cadet 129 and the old JD 112.Works good with and with out a fuel pump. 


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#12 IamSherwood OFFLINE  

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Posted November 28, 2014 - 06:22 AM

I was messing with a K321 recently. Same sort of issue. I cleaned carb, new fuel line, filter,

swapped pump, but still wouldn't perform at throttle. Then I started looking at the ignition system.

Swapped out coil, new condenser, new spark plug, new plug lead, and cleaned points. Every time I

changed something, I'd try it. Finally I decided on new points, and it ran like a champ.

I then swapped back the coil, and pump. Still running great. I should've checked with Ben

right off the get go. :smilewink:

 

I always do the whole fuel system (except pump), when I start resurrecting a machine, and from now on, new

points are on the list too.


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#13 JDBrian OFFLINE  

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Posted November 28, 2014 - 07:17 AM

Fuel pump runs off of cam. Points will cause you all kinds of grief if they are pitted, dirty or out of adjustment. If you haven't checked the carb you should get a kit and clean it anyway. It's not hard to do and then you know it's in good shape.


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#14 EricFromPa ONLINE  

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Posted November 28, 2014 - 08:40 AM

I was messing with a K321 recently. Same sort of issue. I cleaned carb, new fuel line, filter,

swapped pump, but still wouldn't perform at throttle. Then I started looking at the ignition system.

Swapped out coil, new condenser, new spark plug, new plug lead, and cleaned points. Every time I

changed something, I'd try it. Finally I decided on new points, and it ran like a champ.

I then swapped back the coil, and pump. Still running great. I should've checked with Ben

right off the get go. :smilewink:

 

I always do the whole fuel system (except pump), when I start resurrecting a machine, and from now on, new

points are on the list too.

 

 

 

 

 

It's Always the last thing that you check isn't it? Happens to me all the time. :wallbanging:   :rolling: :rolling:


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#15 superaben OFFLINE  

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Posted November 28, 2014 - 06:05 PM

 I should've checked with Ben right off the get go. :smilewink:

 

Those are famous last words.  Everyone who says that ends up screwed up some way or another.  :( 

 

Ben W.






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