RCU Forums - View Single Post - UMS Radial Engines. Who's got one and are they any good?
Old 10-27-2021 | 12:23 PM
  #40  
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DaleD
 
Joined: Jul 2009
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From: North Lauderdale, FL
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Originally Posted by 1967brutus
Isn't the carburettor supposed to take care of that, and the pump to be run at constant speed (on/off switch)?
I think you can control the pump from the transmitter, but you could just as well have the pump run when the ignition is on: Priming should not be an issue with an electric pump and that way you cannot flood the engine unless you leave the ignition on without starting it, which one should never do anyway...
When I bought the pump it was suggested that I programme for 5% flow at idle and around 40% at full throttle.
I have tried one approach which worked for a while but now there seems to be an issue which I need to troubleshoot and resolve. If it is that I do not need to have the pump operate based on throttle position I would be more than happy to just use an on/off switch.

With an on/off operation, what level of output is suitable? I am figuring that MAX output maybe too high.

Thanks for responding

DaleD