Flight Testing:

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March 22nd, 2008 Flight Hours: .5 Total Hours: 3.2
2nd Flight: Squawks: Correction:
Prior to the second flight I installed a pair of SuperTrapp mufflers in an attempt to quiet the engine noise to a level that people listening on the radio can hear me talk. I was surprised when I started it just how much the mufflers helped.

The second flight was planned to be about 30-40 minutes. Once airborne I climbed to 2000' above the airport to monitor engine parameters. About 10 minutes into the flight, at an RPM range of 4200-4400, the "check-engine" light would come on continuously or flash. It did it twice while passing through this range so I decided to land and investigate. Once on the ground I found the codes P0301, P0302, P0303 and P0304. These are cylinder misfire codes for all four cylinders. While the light was coming on I didn't notice any change in engine operation, however there was slightly more vibration than normal.

The misfire codes are set based on what Subaru determined to be too much crank oscillation in relation to the cam sensor. I'm thinking this may be due to two factors; 1) the lower weight of the aluminum flywheel used with the Marcotte, and; 2) The propeller needs balanced. I will investigate further after having the prop balanced.

 

Multiple mis-fire codes. Purchased OBDII monitoring equipment and will monitor on all subsequent flights.

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