Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21

2011cb

Member
Joined
Jul 23, 2011
Threads
1
Messages
33
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
number under cowl is
128602 0215 E1 020314 F8
 

2011cb

Member
Joined
Jul 23, 2011
Threads
1
Messages
33
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
fly wheel is not loose and pully string pull freely until engaging....
spring seems tor etract normally
 

reddragon

Lawn Addict
Joined
Jun 4, 2011
Threads
36
Messages
1,377
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
ok...try some starting fluid....with air cleaner off...shoot it into the carb....if it takes off...its a carb problem.....if not..its an ignition issue
 

2011cb

Member
Joined
Jul 23, 2011
Threads
1
Messages
33
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
Thanks RedDragon I will try that after work today
 

2011cb

Member
Joined
Jul 23, 2011
Threads
1
Messages
33
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
no go using starting fluid...
you can pull the cord 3 or 4 times and nothing happens but on 5 or 6
it tries to start ONCE....you can feel and hear it combust but as soon as it fires it ripes backwards pulling
the cord out of your hand and then nothing.....:frown:
 

reddragon

Lawn Addict
Joined
Jun 4, 2011
Threads
36
Messages
1,377
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
ok.....lets check spark ...to get it out of the way... unplug the spark plug....unscrew the spark plug then plug the wire back on.....have someone else pull the cord while you hold [with a glove] the spark plug threads to a bare spot on the engine block and look for spark [dark conditions help:smile:]....if its good well take the next step:thumbsup:
 

2011cb

Member
Joined
Jul 23, 2011
Threads
1
Messages
33
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
Tested plug for spark and it was very good...had friend pull cord while grounded. Without
plug in motor spun very freely....no back lash or kick....
 

jameswsr

Member
Joined
Jul 25, 2011
Threads
0
Messages
11
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
You definitely have a sheared flywheel key if its drawing your hand back when pull starting, the only other thing that would cause that is if you were trying to start the engine without a blade on the mower. The engine is off time when the flywheel key gets sheared, just ask your buddy if he hit something and he should come clean that he did.
 

Robert R.

Forum Newbie
Joined
Jul 28, 2011
Threads
1
Messages
3
  • / Craftsman Rotary Lawn Mower Wont Start 7.0 HP Power Propelled 21
yes, i agree. check the flywheel key. when the rope tries breaking your hand like that- that is almost always the culprit.
 
Top