I first saw the idea to use a fan on the Vans forum, Jim Stricker posted he was doing it on his -12. The concept is to use the fan to pull the hot air out of the cowl after the engine is shut down. […]
Engine
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The Perfect End To A Cable
Twist welding cable I was always looking for a clean and permanent way to finish the ends of the throttle and choke cables. A short piece of heat shrink works but the end of the cable still gets frayed. Soldering sorta works but it will […]
Engine
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Adding A Second Oil Cooler
I live and fly a lot in So Cal where the summer temps hit 110f, I don’t let the temperature stop me from flying but the Rotax does complain, oil temps will hit 245f on days when the air temp is over 80f in a […]
Engine
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Thermostatis kit
I added the thernostasis to increase warm up times and help keep engine temperatures more consistent. There isn’t a lot to say about it, it does exactly what it is supposed to do. I live in Southern California, the weather hits 110f a few days […]
Engine
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Cable Stops
At idle the throttle cables bottom against adjustable stops on the carburetors. It is important that they stop equally or the engine runs rough and this is bad for the gearbox dogs. Over time the carburetor stops bend and the idle becomes rough. I prefer […]
Engine
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1 Inch Balance Tube
The 912ULS has two carburetors each carburetor supplies fuel / air to only one side of the engine. If they don’t supply exactly equal mixtures then the engine will run rough. This is the reason we do carburetor balancing. I believed if the balance tube […]
Engine
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Carburetor Vent Line Reposition
The Bing 64 carburetors on the 912ULS use atmospheric pressure sensing to control a diaphragm that moves a needle within a jet to adjust for rich or lean. The vent tube that comes off the carburetor bowl needs to sense the same atmospheric pressure that […]