I just recently bought a new engine, and put it in tonight. When i go to pull the pullstart it wants to spin the wheels, and when i roll it on the ground you hear a grinding sound and you feel some restriction, doesnt roll freely like it should. i took the motor back out and noticed that i missed a washer, put that in and it was working fine, started it and went through the first part of the break in. then went to pull it again and started doing it again. Did i install something wrong? something need to be adjusted?