I forgot to mention one thing I can't figure out about the 53 I talked about in my "53 repaired" thread. Twice now upon landing the engine had a squeaky/weezy sound at idle. The first time I thought it must be a loose mount so I checked the bolts and sure enough the bolts were in fact loose. I tightened them and the squeak went away. A couple of weeks later it squeaked again. All bolts were tight and it ran no different than any other time. The squeak was gone on the next run. It since has run flawlessly except for some hard starting which I attribute to my lack of maintenance. The starting issue only appeared late in the season long after the squeaking. I run Sig 10% nitro fuel. Tuning is easy and steady.

Any opinions as to what could cause the squeaking? Thanks!

Ken