just bought a new B7610, i love the tractor but there is some vibration in the motor from about 1500 rpms down to idle. is this normal for the 3cyl. eng? anything from there up it runs smooth.
Its normal, you will also find that its much less vibration at idle then most other tractors. It should smooth right out if you just bump the throttle up a bit.
I take delivery of my B7610 tomorrow, but I noticed the same thing while test driving at the dealership. If I just bumped the throttle up just above idle it would smooth out. It was the same on 2 other units as well.