cam quality
one of the things taught to me very young by my aircraft certified mentor: ALWAYS check a new cam before installing it. They are really long in some engines and easily bent.
Note that we are talking about thousandths of an inch here!
Many backyard motors have died early as a result of this defect in cheeeeep cams. I got one from Crane once that was bent, but it is generally rare.
one of the things taught to me very young by my aircraft certified mentor: ALWAYS check a new cam before installing it. They are really long in some engines and easily bent.
Note that we are talking about thousandths of an inch here!
Many backyard motors have died early as a result of this defect in cheeeeep cams. I got one from Crane once that was bent, but it is generally rare.