On Aug 21, 11:33 pm, robgraham wrote:

I would suggest that it is the blade guard. As you start to cut, the
blade guard should come in contact with the edge of the wood and
rotate out of the way - mine ( a cheapy but perfectly effective)
occasionally sticks slightly and gives just the effect you are talking
about.

I find that I have to lift the blade guard every time, using the
handle provided for the purpose.
The other reason my saw stops cutting sometimes is that the power cord
is caught on something and is tight