K241 running out of ideas

[MalMac 1,328]

Got a K241 that It starts with no problem throttles up then dies. You can sort of save it by using the choke but all that does is prolong the dieing by about 20 seconds. I have had the carb off checked throughly cleaned every nook and cranny, all the little holes in the needles you can eat off this thing. It's got new gas line and tank cleaned. I took the fuel line off the carb turned it over and fuel pump is doing what it is suppose to. I left the gas cap off just to make sure it was not a vent problem. Just acts to me like a fuel starvation problem. After it dies you can hit the key and it fires right back up runs up through the RPM's then dies like it's running out of fuel. You can repeat this process all day long. I was starting to think it might be ignition but if you can sort of save by using the choke seems to me that would eliminate the electrical part. I am running out of Idea's here. Maybe I am missing something very obvious but can't think of anything.

[oldredrider 2,547]

Recheck your float level. It may be set too low or have a pinhole in it.

[Fordiesel69 214]

Disconnect the fuel line from caburetor inlet.  Crank engine for 10-15 sec and watch for a nice flow of fuel.  Next, place your thumb over the hose, and see if the pump is able to push a little pressure.  

 

If all the fuel delivery is good, then you will need to revisit the carburetor.

 

If your intake valve is leaking, typically it will flow OUT the carb throat while it is running, so I would rule out the valves.     

[Mr. 856 170]

if it will stay running by spraying fuel into the carb throat then you can pretty much rule out everything else and focus on the fuel delivery issue.

[the_nite_owl 15]

Recheck your float level. It may be set too low or have a pinhole in it.

 

My 16HP Onan did the same thing recently and it was the float level.   The float was sitting too low in the carb so it never fully closed off the fuel feed and would drown itself in fuel.  I had to bend the tabs on the float to adjust it.  The suggested height for my carb was to have the float 1/4" from the top when fully raised.  Once I did this the issue with too much fuel went away.

[Fordiesel69 214]

if you would post a video link, we may be able to be of more support. 

[can whlvr 991]

I agree with mr 856,spray fuel in the carb with a spray bottle to make sure its fuel related

[WH nut 553]

Plugged Muffler?

[MalMac 1,328]

Alright, I got to where I did as suggested and sprayed gas into the carb. Still died. So that got back to thinking how can it be a fuel problem when it's getting plenty of fuel manually.

Now even though I was still leaning toward a fuel problem I got out my test light and checked a few things. Short story come to find out it was loosing power to the coil. The Prior Owner had used a wire tie off of the choke cable to tie up some of the wiring harness. When I would try and save it form dieing  the movement of the choke cable would move the wiring harness just enough  and would temporarily  keep juice going to the coil. Found a problem with the juice going to the coil way up in the harness. So I will just do a rewire job. Thanks for all the help guys.

[Ed Kennell 35,770]

Good trouble shooting job.  So choke setting  can affect the ignition in this case.  

[squonk 38,928]

Now that sounds sort of familiar! 

[AMC RULES 36,945]

Really, a muffler restriction will cause these symptoms too?    

[shorts 182]

If the air/exhaust can't get out of the engine air and fuel can't get in, just like if you don't exhale you can't inhale.

try a mouse or rats nest in a car muffler or just shove a potato in your tailpipe and see how your car runs.

Edited April 27, 2014 by shorts