OS .61FX W/Pump
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I have an OS 61 fx w/pump on a Sig Astro Hog. The problem I am having is when I throttle up a lot of air bubbles start flowing in the line from the pump to the carb and kill the engine. I have tried various needle valve settings, have changed out all fuel lines, and have changed out the fuel tank. Please Help!
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Must be an air leak on the tank, the fuel line to the pump or the pump itself is leaking air. If not that, then the fuel is foaming up from vibration. Try putting some foam rubber under the tank. If it is touching the fuse formers or other solid area of the fuse all the engine vibrations will be transfered to the tank and the fuel foams up. You can get a brass filter clunk that will filter the air. You should also have a filter inline before the pump, get a filter that will stop air bubbles but make sure it isn't foaming first.
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Thank you for the information...I will give that a try. To the question...B17's is there anything else...the answer is NO. My grandfather was the belly gunner in a B-17 over Germany. He was shot down, ended up in a prison camp, and eventually freed.
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ORIGINAL: twazz
Thank you for the information...I will give that a try. To the question...B17's is there anything else...the answer is NO. My grandfather was the belly gunner in a B-17 over Germany. He was shot down, ended up in a prison camp, and eventually freed.
Thank you for the information...I will give that a try. To the question...B17's is there anything else...the answer is NO. My grandfather was the belly gunner in a B-17 over Germany. He was shot down, ended up in a prison camp, and eventually freed.
Hope you get your air bubbles issue fixed!
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The O.S. Max .61 FX doesn't come with a pump. If you are getting air between the pump and engine, then you have an air leak somewhere in the fuel system upstream of the pump. You may also be getting vibration-induced fuel foaming, which allows the micro-bubble to collect and make bigger ones in the pump.
Your pump may also be bad, and allow air to get into the fuel.
Your pump may also be bad, and allow air to get into the fuel.