I got back in last March after a 15-yr hiatus (same excuses) with a 40 FP. A little WD-40 got it running, but it never ran great and after about 30 flights, resulting in about 15 deadsticks, I replaced it with a used 46 LA. Bolted right in, even used the original muffler, and the plane feels twice as fast. Hope you have better luck with your engine.