Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Finkbeinerpulling

725 wont throttle up

Recommended Posts

Finkbeinerpulling
hi, i just bought a very nice 725 for $150 off craigslist. it hadnt run in about 10 years from what i was told so i got it home and polished the points, dumped gas in it and it fired right up. the only problem is whenever you try to throttle it up or the governor opens it up it acts like the ignition cuts out, ive tried different plugs and cleaned the carb out twice. points are good. does anyone have any ideas? thanks in advance for any help

Share this post


Link to post
Share on other sites
John_RI
The Club has several sponsors that could supply the item. One is Jack's Small Engines: http://www.simpletractors.com/club2/portal_External.asp?LinkID=25&CatTitle= The part # of the condenser is 291369 Good luck!

Share this post


Link to post
Share on other sites
Finkbeinerpulling
Thanks for that John, i have now found that if i close up the spark plug gap about 5 thousanths. it runs all day, im gonna check the armature gap next. ill probably put points and a condensor in it anyway for good measure.

Share this post


Link to post
Share on other sites
jdwilson
Tony, that was how the 8hp briggs on my 728 was acting. I would say "It don't have the power to pull the hair out of your head". After checking everything else, I found that it was the tappet clearance; or I should say ZERO tappet clearance! After filing off the ends of the valves, for the proper gap per briggs manual, and then hand lapping them with valve ginding compound, I then had to file off a bit more for spec. I swear that It feels like I installed a turbo! It seems like a 12hp or larger. I hope that this helps you.

Share this post


Link to post
Share on other sites
Finkbeinerpulling
i have tried electronic ignition now instead of a $50 set of points. this has resulted in no difference so im positive it IS the coil. once the engine gets warm the spark gets so weak that it wont even start. the new coil should be here next week. the valves are something that we wondered about but havent checked yet.

Share this post


Link to post
Share on other sites
Finkbeinerpulling
just an update-the new coil fixed it. while the engine was out we pulled the head and im happy to report the engine is like new on the inside. bore has virtually no wear ring and the valves are like new. looks like i did pretty good for 150 bucks

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)

    • PhanDad
    • steve-wis
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • dav-1

      dav-1  »  Talntedmrgreen

        Over a year ago, you answered a question I had about the tool bar for my FDT. In your reply dated Dec 31, 2019  you said the spacer, part #16, goes in the bar to allow for up and down depth adjustment. does this mean the bolt has to be tightened at whatever depth desired or does the bolt slide up and down, allowing the lower hitch to free float?
         If it is tightened so the lower hitch and the bar are rigid, then is the depth to be controlled by the shoes? Or by the lift handle?
        Is there any kind of user directions for the tool bar? The Outdoor Power Manual basically shows how to assemble the bar but not how to use it
      · 1 reply
    • tribswede

      tribswede  »  goatfarmer

      ISO a deck for a 6516 H and all the connecting hardware any ideas on where to start?
       
      · 1 reply
  • Adverts

×