Why is my Carburetor Flooding? Test the needle & seat for leaks Test the fuel pump pressure. Check with the motors manual for exact measurement but close to 4 lbs, or less. Too much pressure will cause the needle to open pre-maturely. Is the float leaking. Can you hear gas…
Runs Rich Check float level. Test the needle & seat for leaks Weight the Nitrophyl float for proper gram weight. Weights are different depending on which Aisan you have. A carburetor number would be required. For a brass float, immerse in hot water and look for bubbles. If the vehicle…
Fuel enters the float bowl from the fuel pump and through the inlet strainer – If the strainer is missing then be sure you have an external fuel filter in-line between the fuel pump and the carburetor. The strainer is used to keep the inlet needle & seat clear of…
Carburetor flooded. Rebuilt the carburetor and ran fine for 1,000 miles. Started flooding again. Test the float – Nitrophyl is weighed with a gram scale. Brass – heat up a pan of water just prior to boiling. Immerse the float and look for bubbles. Here is what I suspect. The…
Flat Spot at 2100 RPM Got a customer with a marine 2300. It has a flat spot at 2100 RPM. The position of the pump arm cam and/or the correct pump cam. He might be using up the total pump discharge to fast. Low float level. The marine Holley uses an internal…
How the Accelerator Pump Circuit Works As the pump returns to it’s top position, the suction of the pump and the weight of the gas lifts the inlet check ball and fills the pump well. The inlet check ball is there so that it plugs the hole when pressing on…
Spring Loaded Needle & Seat The type of needle & seat which works with the spring-loaded retention system is no longer available. However, the needles used in them are identical to those used with the threaded seat. Some kits contain instructions to simply use the new viton-tipped needle in the…
I have a Holly 4180 carb that has had a leak at the accelerator pump area. I ordered a diaphragm from you(Appreciate the fast service) and it still leaks. Is the cover that sensitive to leaks? I don’t see any cracks or such. Appreciate help and if a replacement cover…
So what does it mean when a carburetor is flooding.Flooding is when there is so much gas getting into the carburetor it is flowing over the top, running out of the throttle shaft, or perhaps a vent tube. Whatever is the least resistance that is where the gas will go….
Engine Doesn’t IdleThis assumes the electrical system is up to par. Most idle problems will turn out to be electrical. Make sure the idle fuel passage is open. Take a look at the illustration to find where the passage are located. Make sure the idle discharge holes are clear. Make…