Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

wiscogus

Simplicity Powermax wont stay running

Recommended Posts

wiscogus

I am helping a good friend with his Simplicity Powermax. The tractor will start and run, however it dies within a few seconds after starting. It will run longer with the choke pulled out slightly. Tractor has the 19.5hp Onan CCKA-MS engine. At one point in time an aftermarket electric fuel pump was added as they thought it wasn't getting enough fuel. 

We also recently replaced the Marvel carb with a NOS replacement but the tractor still runs the same. 

Where should go from here? Any help would be much appreciated. 

Thanks! 

Share this post


Link to post
Share on other sites
ShaunE

Does it run smoothly for the few seconds or rough.  I guess I'd start by looking into the fuel delivery system.  From tank all the way to the carb.  Tank, lines, filter, pump output.

  • Like 1

Share this post


Link to post
Share on other sites
Alltractoredup

Same as mentioned above, as well as, check the pressure output of fuel.  It seems pressure should be around 3-4 psi.

Share this post


Link to post
Share on other sites
jlasater

If it has a feed/return system like on the later 9020's, disconnect the return line and run the electric pump and see if you get fuel coming out. If it is similar, I have seen the suction and return lines swapped which means it will just pull air.

Share this post


Link to post
Share on other sites
babablacksheep

If all of the above did not work, check and see if it still has the original point ignition. If it quits and then restarts after it sits a while, pull the cover on the point box at the front of the engine and check for oil in the box. The seal around the push rod for the points can deteriorate over time and oil can enter the point box and short the ignition. After it sits for a while, the oil drains back to the crankcase and they will start and run again.

 

 

  • 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


  • Who's Online (See full list)

    • airgunner
    • rokon2813
    • simplewrench
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • F.U.N.

      F.U.N.  »  sandyhillbill

      Dear Sandhillbill
      Can you please copy me on this data, for Sun Star parts list.
      :
      September 12, 2004 Mike I sent you a PM and have all the mfgs. available for the tiller/hitch/pto/liftgroup if you need me to send them to you. Let me know. Thanks, F.U.N.    
      · 0 replies
    • gwiseman

      gwiseman

      Club banners are available  for members use during show season https://simpletractors.com/forums/topic/57849-simpletractors-club-banners-available/
       
      · 0 replies
  • Adverts

×