Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  
djcgrand

Sunstar no spark

Recommended Posts

djcgrand
I have a 1990 Sunstar with the Kohler Magnum 20HP engine. I used the tractor on Saturday and things ran fine. Yesterday, however, I went to fire it up (which it typically does right away) and it wouldn't start. It was getting fuel and was turning over fine. I tested for spark and realized it was getting nothing at both plugs. It'll take some doing to fully access the coil so before I do that, I want to make sure there's nothing obvious that I'm missing. The seat switch seems to be fine. The crazy thing is that it was just running Saturday. I must add, that it did sit outside the past 3 days. I was out of town -- it may have rained a little bit. Any ideas, thoughts, input? Thanks in advance for your help.

Share this post


Link to post
Share on other sites
djcgrand
Ambler: Not what I was hoping to hear, but thanks for your response. I was hoping you were going to say something along the lines of "sounds like this wire came loose." :) Do you know how to test the module?

Share this post


Link to post
Share on other sites
ambler
The only test I know is if it fires. If it was a safety switch it wouldn't turn over. Module is like briggs magnetron. You have to remove engine, then the shields to get to it. Good write up in service manual. sometimes moisture penetrates the windings.

Share this post


Link to post
Share on other sites
comet66
I don't know when they changed engines, but if it is the magnum it has one coil, and the command has two. I'd have to dig out my book to see how the two are commonly fed. It's kinda a pain to get to them, you have to pull the engine.

Share this post


Link to post
Share on other sites
Al
Hi Should be a plug with 2 or 3 wires going from the engine to the tractor harness. One of the wires will come from the center of the voltage regulater, and one from the ignition modues. If there is a carb solenoid it will be the third. Typically the white wire is the ignition wire. You should be able to unplug this connector and then check for spark. If you have spark, then it is a tractor problem. If not, then you'll likely have to pull the engine and take the blower housing off. With it off, unplug the "kill wire" from the module and take a set of jumper cables and jump to the starter and check for spark. If you still don't have spark, the mobule is bad. Good luck, Al Eden

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • s_stephen
    • jklw77
    • SmilinSam
    • midnightpumpkin
    • VintageIronCollector
    • simplewrench
    • Chris727
    • Brettw
    • Skelsey1989
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      Paul
       
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      Josh
       
      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts

×