Question about Craftsman Convertible 25cc. Gas Line Trimmer

7 Answers

Craftsman 31679186 when I pull rope, piston does not move. took bolts out of housing but housing is being heldby cluch assembly there is a nut inside the shaft that I can put ascrew driver on that will make the pistom move. shaft is where flexable drive shaft goes.

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  • 13 more comments 
  • yager1118 Aug 22, 2010

    My problem is getting the pull housing off.

    The bolts are all out of the pull housing but the housing is being held on the

    cluch housing shaft by a circular piece that the flexible drive shaft goes

    into. How do I separate the pull housing from the cluch housing?

  • yager1118 Aug 22, 2010

    You didn't answer my last comment.

    How do you separate the pull housing from the cluch assembly?

  • yager1118 Aug 22, 2010

    Hi.

    I can't read the diagram that you posted, but I do have a diagram for the

    31679187 which looks the same.

    Please follow me on the diagram.

    Diagram shows # 34 on the left side of the cluch cover assembly (#35).

    On my weedeater #34 is on the right side of the cluch cover assembly and

    stops the assembly from sliding off.

    #34 spins freely and does not move piston. The flexible shaft that turns the

    cutting strings goes into #34 About 2 inch shaft hole.

    I can put screw driver into this hole and turn the flywheel shaft and piston.

    like there was a screw at the bottom of the hole.

    #34 NEEDS TO COME OFF BEFORE THE PULL ROPE HOUSING WILL COME OFF.

    IS #34 ON THE FLYWHEEL SHAFT AS A PRESS FITTING OR IS THERE

    A SCREW HOLDING IT ON?

    I can move the pull rope housing about 1/4 inch before it hits #34.

    Thanks

  • yager1118 Aug 22, 2010

    thanks. That's the one holding the pull housing on.

    I'll try tapping to get off. It seems that something is broken in the pull housing

    since it is not turning the flywheel shaft.

  • yager1118 Aug 22, 2010

    Not good to give info that would cause me to tear up my machine.

    There was a screw in the shaft of part # 34. I jammed the flywheel and part 34

    came off. My model is 31679186. I think you are looking at 31679187.

    Part numbers 32 33 and 34 are on the right side of the pully housing not

    left. I can't get a diagram of 31679186.

    now, how do I get part #33 off (clutch rotor assembly).

    The diagram you posted is not correct.

  • yager1118 Aug 23, 2010

    Thanks.

    I got the bell housing off. I put ascrew driver in the flywheel. Will do same

    to get cluch off.

    The pull rope is on other side of housing from the cluch.

    How does the rope pully connect to the cluch to make the flywheel shaft turn?

    Looks like I need that connection. Pully just turns freely.

    Will get back to you. The other expert told me to beat on it to get bell housing off.

  • yager1118 Aug 24, 2010

    Excellant advise.

    I have the housing off but do not see anything broken.

    Outer pully and an inner pully with a rewind spring on it.They are held together

    with a palnut on its own shaft. Palnut does not allow any horizontal movement

    on its shaft. The inner pully has a sprocket on it to turn sonething. It doesn't

    contact the flywheel.

    I put it back together and pulled rope but flywheel did not turn. It's almost

    like there is a part missing between the pully and the flywheel. Diagram doesn't

    show anything. No borken pieces in housing.

    I'M STUMPED

  • yager1118 Aug 24, 2010

    Hi.

    Pulling the rope pully should make the flywheel turn to start motor. There's no

    connection between pullies and the flywheel shaft.

    How do pullies turn flywheel shaft?

  • yager1118 Aug 24, 2010

    Hi.

    The housing is off but there is no connection between the rope pullies and

    the flywheel shaft that would make the shaft turn. Pullies are held in the

    housing by a palnut on its own shaft.

    How do the pullies turn the flywheel?

  • yager1118 Aug 24, 2010

    A new housing with pullies cost $38. A new trimmer costs $129.

  • yager1118 Aug 24, 2010

    Thanks.

    By recoil assembly, I assume you mean the housing with the pullies in it.

    Sears only sells the whole housing with the pullies in it. Thats fine, I don't have

    worry about taking the pullies out. There's an outter pully and an inner pully

    with a flat spring. both revolve around a single shaft and are held on the shaft

    with a palnut. The inner pully has a sprocket on it to ingage the flywheel.

    I can see how it should work, You pull the rope, the inner pully moves

    horizontally and engages the flywheel. However, the inner pully is held on the

    shaft by the palnut and can't move horizontally.

    What an missing??????

  • yager1118 Aug 25, 2010

    Hi. Idon't know if you repied to my last comment or not. I had 2 new e-mails

    yesterday but they did not contain any new solutions.

    With your advise, I got the pully hosing off.

    Pully housing has 2 pullies. inner pully has sprocket that looks like it should

    move horizontally and engage flywheel when rope is pulled. There is a palnut

    on end of pully shaft that will not let pully move horizontally.

    Can you tell me how pully works?

    Thanks

  • yager1118 Aug 25, 2010

    Hi.

    #22 (pully housing) Has a shaft in it that the pullies ride on. The smaller inside

    pully has a sprocket on it that looks like it should engage the flywheel The

    pullies are held on the shaft by a pulnut. The flywheel shaft with spacer (#20) goes thru

    the shaft in #22. If sprocket on pully can't move horizontially it can't work.

    Flywheel shaft spacer closes off pully shaft.What do you think?

  • yager1118 Aug 25, 2010

    craftsman weedeater 316791860
    pully turns but does not contact flywheel
    inner pully has spocket that looks like it should move horizontally to contact flywheel
    when rope is pulled.Pulnut on end of pully
    shaft will not allow it to move horizontally.
    How is pulling rope make contact with flywheel.

  • yager1118 Aug 26, 2010

    thanks for your help. You helped me get the trimmer apart.
    The dogs on the flywhel were stuck and the springs would not pull then back to center.

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7 Answers

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craftsman 31679186  when I - 7f5ed40.png If the pull start is locked up, it is either a broken clutch spring or clutch drum. These parts are accessed from removing the pull start assembly for repair and inspection. I listed a diagram, but this site will not allow the diagram to full view due to limited space and size restrictions. You may be able to copy the diagram and paste it to another program to explode the view.

Posted on Aug 22, 2010

  • 1 more comment 
  • GetMeOttaHere Aug 22, 2010

    Once all the bolts are removed, including the lower bolt assembly that closes the bottom area, the housing should come right off. You may have to tap it slightly with a rubber mallet or other soft tool to aid in removal. The clutch springs are most likely giving too much friction during removal also.

  • GetMeOttaHere Aug 22, 2010

    The clutch drum shaft end has flat notched sides and the cover is pressed on. The diagram does not show any other means of holding the cover in place.




  • GetMeOttaHere Aug 22, 2010

    The plastic pulley that the rope winds around may be what is broke or damaged.

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Use a special puller to remove it. The clutch will need replacement since it does no turn the engine no longer. Its a common thing

Posted on Aug 26, 2010

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Hello. Your entire drive cable needs to be pulled out and greased. J.

Posted on Aug 25, 2010

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The drive shaft has to be removed to get to the recoil assy. See this link:
Item 22 is the recoil assy.

To get the shaft out first you will have to remove items 29 and 30. Then items 27 and 28 to remove the cover. After that you should be able to remove the recoil assy for repair. Sears does NOT list piece parts for the recoil assy by most any local lawn mower parts supply / repair shop will have them

Thanks for choosing FixYa.

Kelly

Posted on Aug 24, 2010

  • 2 more comments 
  • Kelly
    Kelly Aug 25, 2010

    I have this exact unit. The pawl nut your speaking of I think is the screw in the center of the pulley. There is supposed to be a thrust spring under there that creates friction and causes a plastic tab to pivot and extend as the rope is pulled. If the spring breaks the tabs to not extend. If you look at the link here I will try my best to follow what your speking of is you use it and respond:

    http://www.searspartsdirect.com/partsdir...



    Sadly none of the pictures show the pulley inside the cover of the recoil. Once all of the screws are out the whole cover should slide off. I knid of get the feeling your saying the outside of the clutch assy will not disengage from the housing. I really am trying to help and have worked on small engines and lawn equipment for over 40 years. I think we are just having a few communcation hiccups here but, we will solve this puzzle.



    Kelly

  • Kelly
    Kelly Aug 25, 2010

    Before you try and take this apart. I think what your saying its your having a a hard time releasing the pawl retainer. Lets back up just a bit. In my years of experience I have returned many of these back to service by gently using a flat screw driver and pentrating oil into the hole of the front of the cover. to loosen the pawl tabs You can use carb cleaner to flush the gunk and when it is dry add a little bit of lubrcating oil once it is cleaned up with penetrating oil and carb cleaner. Actually WD 40 is the ideal product for final lubrication because it not only lubes the pawl tabs but water proofs the corrosion on the spring. Give it a try before you go any further.



    Kelly

  • Kelly
    Kelly Aug 25, 2010

    The rope pulley as you know is in 2 parts. An inner and outer pulley. The pulleys have an angled spline that when you pull the rope is supposed to drive the pawl into the flywheel. The inner pulley at its mount has a spring washer that is supposed to create friction (braking action) so that when the outer pulley is actuated the inner barrel is driven out by the spline action into the flywheel engagement point. You either have a broken spring thrust washer or a jacked up angle spline inside the pulleys.



    Kelly

  • Kelly
    Kelly Aug 25, 2010

    You should be able to grasp the inner pulley barrel pull the rope and have the inner barrel drive out horizontally. If it does not do that then the whole pulley assy has a problem that being most likely a broken thrust washer or as I said earlier the angled splines are damaged inside the pulley.



    Kelly

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No you are missing two allen screws which must be removed

Posted on Aug 24, 2010

Take out the spark plug and look inside of it with a flashlight. If the piston is moving with the rotation of the flywheel then you likely have a blown head gasket. If there is no compression then check for a cracked or damaged piston

Posted on Aug 22, 2010

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Its done.it will cost you more to repair it than to buy a new one.

Posted on Aug 23, 2010

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