They were great saws. I sold dozens of 3700’s for $399. I even had one logger using them.
Biggest issues were the intake manifold coming loose, the odd oil pump, and the brake was not very strong.
I've had the same issue with the intake manifold, I think that was the problem with my saw as well. Other than that, they’re solid saws, especially for the price. The brake mechanism is definitely something you can feel when you compare it to the newer models.