Taking the opportunity

While the engine is off, we're going to do a few other things that are a lot easier without the engine in the way or that just make sense to do along with the engine work.

The biggest one is probably taking off the engine mount, cleaning it off (probably via sandblasting) and painting it. The large bushings that the engine attaches to will also be replaced but that would be done regardless.

They will also overhaul the alternator and oil cooler at Snohomish Flying Service, while the carburetor and magnetos will be overhauled at the shop in California. I'm also going to get a quote on a Surefly Ignition Module. For those unfamiliar with it, the Surefly SIM is an electronic ignition module that replaces one of the magnetos. It provides several benefits including lower maintenance and improved fuel efficiency. The reason only one magneto is replaced is that, being an electronic ignition system, it requires power from the airplane's electrical system. Should the alternator fail, for example, the Surefly will operate only as long as there is sufficient charge in the battery to run it. If it stops operating, you will still have the other magneto to run the engine until you can land.

It's very possible that the engine won't be back on the plane until July, or even August, in which case they'll go ahead and do the annual inspection since it's due by the end of July. They will also test the transponder since it's due, and test the required systems to renew the IFR certification.

Finally, I'm going to have them do a couple of things that aren't related to the engine, but that I'd like done before I start flying it again. The friction lock on the throttle quadrant doesn't seem to work very well, which is very common in this model at its age, so I'm having them check it and repair if needed. I'm also having them replace the clear cover over the landing light on the left wing since the existing one is old, yellowed, and cloudy.