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W ehave HH60 engine...want to know how to time it.

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  • kathleen_175 May 27, 2011

    Coil has been removed and replaced..need to know the relation between the coil arms and flywheel magnets

  • kathleen_175 May 27, 2011

    Coil has been removed. Need to know the relationship between coil arms and flywheel magnets. Two manuals give firing at different spots ...which is correct? 035 or 095 ( you say 080)?

  • kathleen_175 May 28, 2011

    The air gap is not adjustable on this engine. I need to know when the maximum spark is created as flywheel magnets pass coil arms. The position of coil arms is adjustable.

  • kathleen_175 May 28, 2011

    Tony, sorry about the lack of information. It is a HH60 Tecumseh Heavy Duty Horizontal Shaft 6 hp. All ignition parts are under the flywheel. The coil armature and points are mounted on a plate with slotted bolt holes which fits over a boss on the crank case and can be rotated an inch or so. I need to know with the fly wheel magnets at .035 bdtc where should the arms of the armature be to get maximum spark. I do have a Haynes small engine manual which says to line up the timing marks. The problem there are no timing marks! Thanks for trying to help ...

  • kathleen_175 Jun 03, 2011

    We have not been able to fix problem...have taken engine in to mechanic...K

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  • Master
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Hi:
the only issue is getting the spark timed with the piston/crank. Not having the tool that the manual says to use makes it a little diffcult, I used a method that made perfect sense to me. First, I took the head off, then found what appeared to be TDC of the compression stroke. Here I laid a flat piece of bar stock over the bore and took a measurement between the bar stock and the piston (.016). Then looked up the BTDC for the engine (.080) added the .016 and set the piston .096 from the bar stock. Then set the ignition plate for when the points just start to open.
Hope this helps you also, after the above procedure the enging ran fine.

Posted on May 28, 2011

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  • Master
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  • Well, the first thing you need to know is that the timing speck for an HH60 is .080 Before Top Dead Center (BTDC)
  1. So your going to set your dial indicator to "0" when you are at Top Dead Center (TDC)
  2. Now you need to turn the piston back a bit (past .80) and start to very slowly come up to .080.
  3. Now move the starter plate until the points just barely open.
  4. Once these steps are accomplished you can tighten the bots up and your engine is now timed.
  5. It's just that simple.

Regards, Tony

Posted on May 27, 2011

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  • Iron
    Iron May 27, 2011

    Pleas note to turn your piston back a bit more the *.080* then turn it back to .080.

    Regards,
    Tony

  • Iron
    Iron May 27, 2011





    • The coil gap has to do with spark. It's the distance between the ignition module and the flywheel magnet. Basically when the flywheel spins and the two cross a spark is sent to the spark plug. You want to know what I use? I use a dollar bill.for this. When setting points you really just need the smallest gap possible. Honest, you will be fine.



    Regards,

    Tony


  • Iron
    Iron May 27, 2011





    • Basically you are gonna turn the flywheel back until the flywheel magnets are strait on with the ignition module arms.

    • Then your going to stick your gauge in between the two. I would just use a dollar bill folded in half or a matchbook.

    • Now push the ignition module to the flywheel and then you can tighten them retaining screws.

    • That's about it for that.



    Regards,

    Tony

  • Iron
    Iron May 28, 2011





    • I guess I should have asked for the number off the engine in the first place because HH60 is very vague. Just loosen the arm a bit, set your guide to 035, slide it between the arms and flywheel magnets and then tighten the arm bolts up.



    Regards,

    Tony

  • Iron
    Iron May 28, 2011







    • You will adjust the flywheel magnets @ .95 BTDC and the arms need to be set @ .035. I guess the confusion came in where I suggested to use a dollar bill folded in half to set the arms. I hope this helps clear things up.



    Regards,

    Tony

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