Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors


Fuel line length?

Recommended Posts

How critical is the fuel line length for briggs motors?? Will you have problems with a longer fuel line because of the extra friction loss that you develop?? Want to move the tank for a briggs motor further away from the motor than it was originally and figured if I mounted it slightly higher than it was originally the little bit of extra developed head pressure should overcome the friction loss of the longer gas line, but have concerns that the float needle will not hold back the extra pressure and will flood all the time. Or possibly use a larger diameter fuel line to prevent starving the motor for fuel. Thanks for any thoughts on this one:)

Share this post

Link to post
Share on other sites
There really isn't any "friction loss" to speak of in fuel lines unless you are running something that guzzles a serious amount of fuel, like running methanol or a pair of Holley Dominator carbs :-) If the tank is within a couple feet of the engine, it should be fine.

Share this post

Link to post
Share on other sites
When I repowered my 3410,I had to reroute the fuel line,and probably added a foot or so to it.No problems as long as it's still running downhill from the tank.

Share this post

Link to post
Share on other sites
Line length is not critical because the fuel flows very slowly. If you move the tank, make sure that you have it sitting at the same height as before. If you lower the tank you will lose fule pressure, and may run out of fuel at the carb when there is still some in the tank. My 61 Wards runs out of gas with 2 inches in the tank. I have a Kohler with a side draft carb rather than the original B/S with the updraft carb attached to the long tube. I need to raise the tank.

Share this post

Link to post
Share on other sites
This topic is now closed to further replies.

  • Who's Online (See full list)

    • RayS
    • s_stephen
  • Today's Birthdays

    1. rokon2813
      (55 years old)
  • Recent Status Updates

    • 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
    • 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
  • Adverts