Marine Trader transmission noise
1988 MT 34 with SP135, bought it last year, ran it in the yard for about 10 hours between the fall and this spring. Launched and ran OK for about 5 hours. Two days ago when I started it up, noticed something like a raspy whine (similar to the annoying buzzer before oil pressure comes up) at idle and while warming up. Looked around, sounded like it was coming from the front of the trans. I increased the revs, and it went away. Cruised around for a couple of hours without any issue (yes, I checked all the fluids, and had replaced the trans fluid earlier this year).
Yesterday, same problem, but even louder - noise started about 1 minute after motor start. Seemed to be coming from the same place, and I could even hear it conducted to the shift lever if I put my ear on it. It was louder than the previous day, and after a couple minutes of looking and listening again, it went away when I increased revs, and never came back during a couple hour cruise.
Anyone had a similar problem?