Question for Wimmera Farmer
Did you ever get your D4C with the Buzzbomb pony operational? If so, could you post some pic's of it and the Buzzbomb in operation? Would love to hear the sound of it as compared to the horizontal ponies.
So near and yet so far. Turn on fuel 3/4 choke and 2 pulls it will fire but getting it to run for more than 5 seconds just will not happen. I have diassembled carb 3 times with no measurable improvement. Spark is good timing must surley be right as it will sometimes run a bit. Plug leads are new solid core.
Certainly winds up when it does go. I don't have a suitable camera to make a video clip.
Finished sowing crops yesterday so might get a moment to have another go at it. Going to try higher octane petrol and new plugs next.
From the description, it sounds like a fuel supply problem. Could you have a partially plugged fuel line or shutoff valve? Or maybe an inline fuel filter that's full of gunk? Depending on what kind of gas you're using if the float needle is one of the plastic tipped ones, the plastic could have deteriorated and is causing a problem. Just a few things to look at. . .
Thanks for the update. Ol Grump has some good points there. Sounds like a fuel supply problem to me also. Have you cleaned out every nook and cranny of the carb real good? The carbs on the horizontal ponies can be real pains also. Good luck on your crops.
Fuel Shot Off
On a few cats I've had, I found the same problem. On the fuel shut off valves, take them apart, they unscrew, the valve comes out of the body. They gum up there. On one, it was a valve just below poney,mid-way on the fuel supply line, it had a screen in behind valve. When I took it apart, I was amazed on how much crap was plugged in it. Good luck-glen
Thanks for the interest. Have good fuel flow to the carb have drained the tank twice by running it out through the pipe.
Could be a sticking needle/float but seems OK. May try a new base gasket, it will be something simple when I find it. There is wear around butterfly shaft but not a lot, could try packing with grease for a tempory seal to test the theory.
Getting a bit stumped may even rig a tempory fuel supply with a higher tank see what happens.
Originally Posted by wimmera farmer
Remove the cover on the float bowl, and check the needle and seat operation, making sure the needle drops with the float. I have had that problem with my D-2 on occasion. Just a bit of rust on the needle will impair the operation, and not allow enough petrol to flow into the bowl. I had a rust problem in the tank, and removed it, and cleaned with citric acid. The rust flakes kept blocking the flow into the settling bowl nipple where it connects to the tank.