Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

6518 Running Hot

Recommended Posts

I drove my 6518 about 3 blocks to go mow my friends back yard. After I was done with the drive and mowing, I shut it down and turned off the fuel valve. Lots of Heat! I could feel it coming off the hood. Do 2 cylinder engine get much warmer than single cyliners? This is my first 2 cyliner engine, so Its new to me. Is there a way I can keep it cooler? Maybe a small fan to mount in the grill?

Share this post

Link to post
Share on other sites
Mark, the original engine was an opposed twin and all the venting on the hood was intended to relieve the heat buildup, do you have all the shields on the engine back in place? grass clippings will get to the fins and cause it to overheat.

Share this post

Link to post
Share on other sites
Its all clear, all the tins are in place and nothing is stuck in the fins. Just to ask, does anyone know what kind of smaller fan I can use to mount into the grill? Thank You

Share this post

Link to post
Share on other sites
Mark, if you make it up to northern tool in Menominee Falls, I'm sure you can find a 12volt cooling fan there for very cheap. I have not been there in a few years so I'm not sure what there inventory is now days. (They are right on the corner of Pilgram road, and Hwy 175, Appleton Ave) It won't hurt to mount one in the grill, put a switch in the dash and turn it on as you feel needed.

Share this post

Link to post
Share on other sites
Hi Mark: My favorite trick for cooling down any air cooled engine is to let the engine run at about one third throttle for 3 or 4 minutes before shutting it off. As long as the fins are clean and the blower system is clear this should significantly reduce the amount of heat generated. I have a Kohler 17hp twin on a 917 Allis and a Sovereign with an 18hp V twin Kohler and both seem to produce more heat than the single cylinder engines. This should stand to reason because of twice as many cylinders. Hopes this helps. Dave

Share this post

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

  • Who's Online (See full list)

    • Bird76Mojo
    • Bill725
    • spagester
    • PhanDad
    • Chris727
  • Today's Birthdays

    1. Briggs
      (53 years old)
  • 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 
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      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