Lately, like for the last month my P71 has off and on had a hard time
starting.  It will go for a week just fine, then I go to start it and
it cranks for 10 to 15 sec. and fires and dies.  I try again it fires
and dies, I hold the pedal to the floor and crank and it starts but
runs rough for a few seconds.  After that it starts fine until about a
week later it does it again.  Then last Sun. it started hard as I
pulled it out of the garage, I left it sit for a few hours, when I
went to put it back in the garage it started hard again ran for a
minute then died.  Now it won't start at all.  Is this the fuel pump?
Any help greatly apprieciated.

Roger