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I did a tune-up on a Stihl KM 56RC. Three hoses connected to the carb. Two I connected correctly. The third I could not find where it came from. Now the Trimmer runs at h high all the time.

Tube showed only two hoses that run into the fie tank. Mine there was a long one. A short one that went into the tank and had the filter connected. and the third on top of the carb. I left this one unconnected.

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5 Suggested Answers

Vee-Max

  • 4 Answers

SOURCE: stihl carb

Try this link. It has the carby settings on page 26 & 27 of the Stihl FS 45 manual.
http://www.mccoyslawn.com/parts-manuals/Stihl/FS45_46_Manual.pdf

Posted on Jul 19, 2009

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Anonymous

  • 173 Answers

SOURCE: Stihl weedeater starts but won't run at high speed

This sounds like a timing problem.
It is too far retarded, and needs advancing a couple of thou.
There you go:)

Posted on Jul 25, 2009

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DALE BURNS

  • 71 Answers

SOURCE: stihl line trimmer starts but won't stay running

check to make sure your kill switch is not shorting and you have the right gap from the coil to the flywheel also if the flywheel sheer pin is damaged in the least this will cause a multitude of problems... it is the timing pin and must be in good shape not damaged or sheered ..any way reply to mrdmburns@cableone.net and i will try to help you through this.... DALE good luck and will wait for reply..

Posted on Aug 29, 2009

rycgl

Roy Cagle

  • 1545 Answers

SOURCE: have a poulan pro ppb350 31ccweed eater runs short

This is an ongoing issue for users, and rightfully so. Small diameter line out of fuel tank (has filter in-tank on end) connects to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then pushes any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Years ago on 2-stroke trimmers, primers were not even used,...you choked the carb with a slide lever and gravity let fuel enter the carb from above...a few pulls, a "pop"...slide it off of choke and away you went.
If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where the line is held in place with a nylon nipple connector that keeps the line from pulling out of the fuel tank.

Posted on Sep 11, 2010

rycgl

Roy Cagle

  • 1545 Answers

SOURCE: Hi, I have a ryobi BC30 brush cutter my fuel lines

The small diameter line out of fuel tank (has filter in-tank on end) connects directly to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then "pushes" any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Again, on the primer bulb, the longer nipple has a line going directly from it to the tank. This is the return line. The shorter nipple on the bub has a line from it going to the metering chamber side of the carb. If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where sometimes the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank. Otherwise, the line should enter the tank for about 1/2" or so

Posted on Nov 09, 2010

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Were does the small vent tube out the top of the gas tank go on a stihl 029 farm boss. mine broke off flush with the nipple and is leaking gas badly.


This is very important that the connections are correct. The fuel is pulled through the carburetor to purge all the air before starting. Air will keep the fuel pump from refilling the carburetor when attempting to run.

A filter is attached to the end of the fuel tube located in the tank. This hose is the fuel pickup and passes through a tight hole in the tank. The other tube is the return also from the carburetor and is open on the end returning inside the tank also fitting through a tight hole in the tank.

It is easy to reverse these tubes. If one has cracked it is likely all need to be replaced. Take pictures and take notes before starting.

Reversing the hoses allows for unfiltered fuel to fill the carburetor with the result of plugging the jets.


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1 Answer

It starts easily but turns off after about 10 to 30 seconds


I suspect a fuel supply problem. filter could be plugged. I just went through this yesterday with a john deere. After looking inside the gas tank I found the filter still hooked up to a hose that had broken off inside the tank. New hose's and some fiddling around fixed mine.

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What is the purpose of the second smaller tube on the fuel tank fill neck tube?


if it dose not go directly to fuel filter it could be vent.....

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1988fxstc. Oil is blowing out of what looks like a oil tank vent hose that ends down by the rear tire. This is not the drain hose, but looks like a venting hose that is open near the rear tire. Anyone...


Without seeing the bike, I would guess that this is the crankcase vent. Originally, the crankcase vent tube came up from behind the oil pump and went to the backside of the air filter. A lot of owners changed the routing of this hose due to oil being blown into the air filter. They simply remove the metal part of the tube and replaced it with a short open ended hose running back and ending just forward of the rear tire.

As for the oil blowing out of the tube, it depends on how much oil blows out of the tube. If it's just a mist that will sometimes coalese into a droplet, this is about normal. But, if it's a steady drip or flowing oil, this is not right.

If the mist is heavy, this could be caused by excessive blowby on the rings creating high crankcase pressures. The use of synthetic oil should not increase the blowby unless the rings are in poor shape, then it will. The use of synthetic oil seems to aggrevate any minor leak turning it into a much larger leak.

If the oil is coming out in a steady stream or pumping the oil out of the engine, you proabably have sheared a key in the scavenge gears of the oil pump and it's not pumping the oil back into the oil tank.

Now there is a vent hose on the oil tank but it should be routed to a fitting on the crankcase that is located just above and slightly behind the top of the oil pump.

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Steve

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1 Answer

Where is the fuel filter located on a 1994 dodge ram


Fuel Filter REMOVAL & INSTALLATION CAUTION
Never smoke when working around gasoline! Avoid all sources of sparks or ignition. Gasoline vapors are EXTREMELY volatile! All 1989–93 Gasoline Engines and 1994–96 2.5L Engines The fuel filter is located in the fuel line on the inside of the left frame rail, just ahead of the crossmember. Fig. 1: Fuel filter location for gasoline engines 88471011.gif
  1. Relieve the fuel system pressure as described in Section 5.
  2. Unfasten the filter retaining screw and remove the filter from the frame rail.
  3. Wrap a shop towel around the hose connections to catch fuel spillage. Loosen the fuel hose clamps and disconnect the hoses from the filter.
  4. Remove the old fuel filter and replace it with a new one.
  5. Connect the fuel hoses and tighten the hose clamps. Position the filter on the frame rail and tighten the retaining screw to 75 inch lbs. (8 Nm).
1994–96 Gasoline Engines — Except 2.5L The fuel filter is integrated into the fuel pressure regulator which is mounted in the fuel tank. This unit is not controlled by the PCM or engine vacuum. It is calibrated to deliver approximately 35–45 psi (241–310 kPa) of fuel pressure to the injectors. If the pressure exceeds the maximum of the specified range, an internal diaphragm closes to route fuel back into the fuel tank. This system eliminates the need for conventional return lines from the engine bay and accounts for the name of the "Returnless'' fuel injection system employed in these vehicles. NOTE: Fuel tank removal is required for this procedure. Also needed will be external snapring pliers and proper hose clamp pliers, such as No. C-4124 pliers (available through Plymouth/Dodge dealers), or equivalent.
  1. Relieve the fuel system pressure as described in Section 5. Fig. 2: With the fuel tank removed, twist and pull the fuel filter/regulator for removal from the rubber mounting grommet 88471707.gif

  2. Drain the fuel tank and remove the tank.
  3. Remove the fuel filter/regulator (which is pressed into a rubber grommet) by twisting and pulling it straight up. Fig. 3: Use snapring pliers to remove the retainer securing the cover tube to the base of the filter/regulator 88471708.gif

  4. Remove the snapring retaining the cover tube, then slide it down to reveal the clear plastic fuel tube and its retaining clamp. Fig. 4: Cut off the old tube clamp without damaging the plastic fuel tube 88471709.gif

  5. Gently cut off the old clamp without damaging the tube, then discard the clamp.
  6. Carefully pull the tube off, then remove the filter/regulator from the fuel pump module. To install:
  7. Install a new clamp over the plastic fuel tube and attach it loosely to the filter/regulator. Rotate the unit in the line until it is pointed to the driver's side of the vehicle.
  8. Tighten the clamp using hose clamp pliers such as No. C-4124 (available through the Plymouth/Dodge dealer). NOTE: Do not use conventional side cutters to tighten the clamp.
  9. Slide the cover tube up to the bottom of the filter/regulator and install the snapring.
  10. Carefully press the assembly back into the rubber grommet by hand. It should be pointed to the driver's side of the vehicle.
  11. Install the fuel tank.

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1 Answer

Where is the fuel filter on 2001 dodge ram 1500


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Nissan sentra fuel problem. Put new filter and fuel pump but no gas getting to filter to get to pump. Gas line problem from tank?


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This post helped me with my McCulloch Mac 3216 chainsaw. There are two holes in the gas tank - one above the other. One is for the gas line (with the filter on the end) and the other is for the overflow - a simply line that runs from the "out" nipple on the primer bulb into the gas tank. The filtered fuel line goes to the nipple on the back of the carb. Another short line goes from the "in" nipple on the primer bulb to the nipple on the front of the carb.

There are two notches just out from the two holes in the gas tank for holding the lines that go in -- this may help you locate the holes.

I found it helpful to pull the lines that go into the gas tank out through the gas cap hole and leave them hanging out until the housing was reassembled. I also left the lines that plug into the primer bulb hanging out through the hole where the bulb goes until the housing was put back on. Leave plenty of extra line for the lines going out to the primer bulb. Once the housing is in place, cut the lines to the primer bulb and attach them, and slip the lines into the tank, making sure the ends are as far down in the tank as possible. You will need this extra "slack" to work with the housing to get it back on.

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1999 jeep cherokee do you have to remove the fuel pump to replace


The combination Fuel Filter/Fuel Pressure Regulator is located on the fuel pump module. The fuel pump module is located on top of fuel tank.

The filter/regulator may be removed without removing fuel pump module although fuel tank must be removed.

REMOVAL
  1. Remove fuel tank. Refer to Fuel Tank Removal/Installation.
  2. Clean area around filter/regulator.
  3. Disconnect fuel line at filter/regulator. Refer to Quick-Connect Fittings for procedures.
  4. Remove retainer clamp from top of filter/regulator. Clamp snaps to tabs on pump module. Discard old clamp.
  5. Pry filter/regulator from top of pump module with 2 screwdrivers. Unit is snapped into module
  6. Discard gasket below filter/regulator.
    1. Before discarding filter/regulator assembly, inspect assembly to verify that O-rings are intact. If the smallest of the two O-rings can not be found on bottom of filter/regulator, it may be necessary to remove it from the fuel inlet passage in fuel pump module.
    INSTALLATION
    1. Clean recessed area in pump module where filter/regulator is to be installed.
    2. Obtain new filter/regulator (two new O-rings should already be installed)
    3. Apply a small amount of clean engine oil to O-rings. Do not install O-rings separately into fuel pump module. They will be damaged when installing filter/regulator.
    4. Install new gasket to top of fuel pump module.
    5. Press new filter/regulator into top of pump module until it snaps into position (a positive click must be heard or felt).
    6. The arrow molded into top of fuel pump module should be pointed towards front of vehicle (12 O'clock position).
    7. Rotate filter/regulator until fuel supply tube (fitting) is pointed towards front of vehicle (12 O'clock position).
    8. Install new retainer clamp (clamp snaps over top of filter/regulator and locks to flanges on pump module).
    9. Connect fuel line at filter/regulator. Refer to Quick-Connect Fittings for procedures.
    10. Install fuel tank. Refer to Fuel Tank Removal/Installation.
WARNING: THE FUEL SYSTEM IS UNDER CONSTANT FUEL PRESSURE EVEN WITH THE ENGINE OFF. THIS PRESSURE MUST BE RELEASED BEFORE SERVICING FUEL TANK .

Two different procedures may be used to drain fuel tank (lowering tank or using DRB scan tool).

The quickest draining procedure involves lowering the fuel tank.

As an alternative procedure, the electric fuel pump may be activated allowing tank to be drained at fuel rail connection. Refer to DRB scan tool for fuel pump activation procedures. Before disconnecting fuel line at fuel rail, release fuel pressure. Refer to the Fuel System Pressure Release Procedure for procedures. Attach end of special test hose tool number 6541, 6539, 6631 or 6923 at fuel rail disconnection (tool number will depend on model and/or engine application). Position opposite end of this hose tool to an approved gasoline draining station. Activate fuel pump and drain tank until empty.

If electric fuel pump is not operating, tank must be lowered for fuel draining. Refer to following procedures.

FUEL TANK REMOVAL
  1. Disconnect negative battery cable at battery.
  2. Release fuel system pressure. Refer to the Fuel System Pressure Release.
  3. Raise and support vehicle.
  4. If Equipped: Remove fuel tank skid plate.
  5. Remove 4 fuel hose shield mounting bolts and remove fuel hose shield from body.
    1. Remove fuel tank fill hose and vent hose clamps at fuel tank filler tube. Remove both hoses at fuel filler tube.
    2. Remove exhaust tailpipe heat shield mounting bolts and remove shield. CAUTION: To protect fuel tank from exhaust heat, this shield must reinstalled after tank installation.
    3. Place a hydraulic jack to bottom of fuel tank. WARNING: PLACE A SHOP TOWEL AROUND FUEL LINES TO CATCH ANY EXCESS FUEL .
      1. Disconnect fuel supply line from fuel extension line near front of fuel tank. Refer to Fuel Tubes/Lines/Hoses and Clamps. Also refer to Quick-Connect Fittings for procedures.
      2. Disconnect EVAP canister vent line near front of tank.
      3. Disconnect fuel pump module electrical connector (pigtail harness) near front of tank. Harness connector is clipped to body.
        1. Remove two fuel tank strap nuts. Position both tank support straps away from tank.
        2. Carefully lower right side of tank while feeding both fuel hoses through access hole in body. Fuel Tank Full And Not Drained Using DRB Scan Tool: To prevent fuel loss through hoses, keep left side of tank higher than right side while lowering. Do not allow hose openings to drop lower than top of tank.
        3. Continue lowering tank until clear of vehicle. Place tank on floor with left side (hose side) higher than right side
          1. Drain tank by removing fuel fill hose at tank. Fuel fill hose is largest of 2 hoses. Insert the drain hose (from an approved gasoline draining station) into hose opening. Drain tank until empty.
          2. If fuel pump module removal is necessary, refer to Fuel Pump Module Removal/installation for procedures.
          INSTALLATION
          1. If fuel pump module is being installed, refer to Fuel Pump Module Removal/installation for procedures.
          2. Install fuel fill/vent hoses to tank fittings. To prevent hose from kinking, rotate each hose until index mark on hose is aligned to index tang on fuel tank.
          3. Install hose clamps to hoses. Position clamps between index marks on each hose.
          4. Position fuel tank to hydraulic jack.
          5. Raise tank into position while guiding fuel fill and vent hoses into and through access hole in body.
          6. Continue raising tank until positioned to body.
          7. Attach two fuel tank mounting straps and mounting nuts. Tighten nuts to 10 Nm (90 in. lbs.) torque. Do not over tighten nuts.
          8. Install both fuel hoses to fuel fill tube. Tighten both retaining clamps.
          9. Position fuel hose shield to body. Install and tighten 4 mounting bolts.
          10. Connect fuel pump module pigtail harness electrical connector near front of tank.
          11. Connect fuel pump module supply line near front of tank. Refer to Quick-Connect Fittings for procedures.
          12. Connect EVAP hose near front of tank.
          13. Install exhaust tailpipe heat shield.
          1. Install fuel tank skid plate (if equipped).
          1. Lower vehicle and connect battery cable to battery.

Feb 08, 2009 | 1999 Jeep Cherokee

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