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Fuel line routing

I have a Yardmachine 21A-121R900 tiller that was given to me in a not running state. I have rebuilt the carb and got it running at this point, but it is difficult to start. I suspect, since I am not the first one to work on it, that the fuel line routing may not be correct and might be causing some of my starting problems. The engine is a 6MTDS.0314MR:EM and has a regular line to the carb from the tank and also a line to a starting primer. Any ideas where I can get info on this engine?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: routing of fuel lines from tank to primer bulb to carb

Line with filter goes to carb inlet,
Line from carb goes to inlet side of bulb.
Line from bulb goes to tank

Posted on Mar 21, 2009

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SOURCE: Tiller won't stay running

Hmmmm.....it sounds like restricted fuel flow to me, but explain "rebuilt the carb" so I can get an idea on what you did.

Though it sounds right off like you whooped it good and got the basics.

Right off, go back through the "system", check the fuel flow, check that spark on the plug. Eyeball for any loose wires (E.G., Kill Switch, etc.) that are grounding (you never know!)

Stick to KISS on this one, since it ran before the carb got bad and got rebuilt, it will be one of those things you replaced, rebuilt, or changed. Sometimes, it is the SMALLEST thing......

Posted on May 28, 2009

wadembly
  • 489 Answers

SOURCE: fuel lines on my cultivator corroded. I do not

ok you have two fuel lines coming in from tank the one that has the fuel filter atached inside should go to the top & the other is just the return line try that & let me know if it helps wade at wadembly@aol.com

Posted on Jun 06, 2009

moretons
  • 155 Answers

SOURCE: LOOKING FOR INFORMATION ON FUEL LINE ROUTING

most trimmer fuel lines run from line in tank with pick up filter to bottom of carby then out of top of carby to inlet on primer usually the smaller tube then out of the longer tube on the primer and back to the tank.

Posted on Jul 25, 2009

  • 52 Answers

SOURCE: String trimmer, fuel lines disintegrated, I need routing.

The Walbro has two connections on it for the fuel line. My Walbro has one connection on the side of the idle screw and main fuel adjusting screw. This connection hooks up to the suction side of the primer bulb. Usually the shorter stem. (You actually **** fuel through the carb instead of pushing it through.) On the other side of the carb is the other hook up. It draws fuel from the tank. This line will connect to the side of the tank that has the filter. The other side of the tank is your return and it hooks to the other connection on the primer bulb. Usually the longer stem.

Posted on Apr 19, 2010

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