Mazda 6 Service Manual: No.4 hard to start/long crank/erratic start/erratic crank

No.3 will not crank

No.5 engine stalls-after start/at idle

Other materials:

Mazda 6 Service Manual: General procedures
PRECAUTION (SUSPENSION) Wheels and Tires Removal/Installation When a wheel is installed, tighten it to 88-118 N·m {9.0-12.0 kgf·m, 65.0-87.0 ft·lbf}. Suspension Links Removal/Installation Tighten any part of the suspension that uses rubber bushings only after the vehicle has been lowered ...

Mazda 6 Service Manual: How to Use Stitcher™ Radio
What is Stitcher™ Radio? Stitcher™*1 radio is an application which can be used to listen to Internet radio or stream podcasts. Recommended content is automatically selected by registering content which you put into your favorites, or by pressing the Like or Dislike button. For details on ...