Straight From the Horse's Mouth - The final chapter

Jump to content
Ryan99

GT1600 Won't start when warmed up.

Recommended Posts

I have GT1600 that starts fine when cold but after running a couple minutes it will not start. It cranks over fine and has spark. I've tried starting fluid and it won't even try to fire. I'm looking for any suggestions as my son loves it and uses it to pull the lawn sweeper. 

Share this post


Link to post
Share on other sites

Welcome to the forum.

First thing I would do is try a new pair of spark plugs designed for this engine and properly gap the electrodes. Spark plugs can fire out of the engine but fail when in the engine under compression. Spark plug gap is critical in magneto ignition systems. Too small a gap results in weak spark. Too wide a gap can compromise the insulation on/in the ignition coil because it will release that energy somewhere if it can not fire the plug. If new plugs don't make it run remove them and save for the next time 

 

Garry

  • Like 2

Share this post


Link to post
Share on other sites

:text-welcomeconfetti:

 

Does it stall out when it gets hot? Is it getting gas at carb? Thinking maybe starved for fuel? Vent cap plugged on gas tank?

 

:twocents-02cents:

  • Like 2

Share this post


Link to post
Share on other sites

:WRS: Fellow Cheese head. Both suggestions above sound like good places to start.  

  • Like 1

Share this post


Link to post
Share on other sites

Magnito is bad.  The Briggs twins go through them.  Once they get old they get weak and it's worse once they get warm for some reason.  Should be able to find one on the bay.  

  • Excellent 1

Share this post


Link to post
Share on other sites

Thank guys. No it does not stall when running. It runs really well. When trying to start it has plenty of fuel. I just replaced the plugs a year ago. I'll order a magnito and try that. Someone had told me the valves might worn and not closing fully. Has anyone seen that?

Share this post


Link to post
Share on other sites

If you used champion plugs at home depot or lowers with the pin point electrodes, that is your problem.  Order the correct ones from a dealer and make sure they are plain.  None of that marketing crapola.  Our 16HP and 18HP both had that issue and I found it was the plugs.

 

I also could be the mag as others suggested, but try plugs first, their cheap.

  • Excellent 1

Share this post


Link to post
Share on other sites
7 hours ago, Ryan99 said:

 Someone had told me the valves might worn and not closing fully. Has anyone seen that?

I think you are referring to the valve seat issue these engines had.  The seat would come out of the block and not allow the valve to close.  Highly unlikely this is your problem here.  It would still run on the other cylinder and the problem would be constant, not just when warm.  Valves could just be out of adjustment but I don't think that would vary with temperature either.

Edited by aHorseofCourse
  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×