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Ron's Web Site
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Date: 12-12-2010
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Number of Hours: 2.50
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Manual Reference:
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Brief Description: Engine Runup Preparation
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I prepared the engine for its initial runup. I installed the Bracket air filter, removed the spark plug silica gel, squirted two squirts of mineral oil into each cylinder, lubed the Vetterman exhaust with Mouse Milk as specified by Vetterman as an annual event, and pulled the airplane out of the hangar for spinning the engine to bring up the oil pressure prior to installing the spark plugs. Unfortunately after a few minutes of turning the engine over by the starter, I wasn't seeing any oil pressure. I found a small oil leak on a hose fitting, which was easily fixed by tightening the AN nut. I disconnected the oil pressure line from the sender, and it was clear oil was squirting out the hose. I then pulled the plane back in the hangar, as I don't know if the EFIS isn't working or if the engine isn't putting out enough oil pressure. I hooked up an air line using a 1/8 inch NPT to 1/4 inch NPT adapter, and connected a 1/4 inch female air coupling, and adjusted my air compressor regulator gauge to 30 psig, The Stewart Warner oil pressure sender spec's are 240 ohms at 0 psig to 33 ohms at 100 psig. I measured the resistance of the sender using a VOM. I measured 239 ohms at ambient pressure, and then at 30 psig, I measured 169 ohms, which corresponds to about 30 psig. So apparently, the sender is working. Next, I grounded the EFIS lead, which sent the EFIS oil pressure indication to the upper limit, suggesting that the EFIS is working.
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Brackett air filter installed.
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Mouse Milk on exhaust slip joints.
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Verifying oil pressure sender function.
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