Project: wlawrence     -     Entry

May 06, 2023 Another engine run Category: Engine
Mixed results. Just a very slight drip from one valve cover. Magnetron ignition is DEAD, in spite of ANOTHER new magnetron. It's coming off, to be replaced by a Simple Digital Systems CIP. I have the Subaru coil pack in hand already, and I have ideas about mounting the "flying magnet" for timing pick off. I had this possibility in the back of my mind since I bought this project, I decided to give the stock AeroVee system one more try before adding weight and electrical load to the airplane. No Joy....

In other news, installed a ground power plug so I can connect a charger (solar or otherwise) to the airplane with the cowling on.

Ran engine for about .2 tach hours. CHTs all stayed within range. Oil pressure good. Oil temperature pretty slow to rise. #1 and #4 EGTs seem to be dead. And I need to double check if the fuel gauge is actually working.

I had tweaked the mixture about 1/4 turn Lean since last week, but it still takes almost full pull on the mixture to kill the engine. I want it to kill at about 1/2 pull. Tweaking the needle is somewhat of a PITA - the stainless set screw that locks the needle carrier can go walk about in the carb body, and it's only mildly magnetic so it's a bee-yatch to fish it out. I'll put some grease on the allen key before I tweak it again, but it clearly can go leaner.

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