Question about Stihl Hs 81, 86 R, Rc, T, Tc Trimmer Parts Manual

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Starts and stops but if i keep pressing primer runs for few seconds then stops / hs81r

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  • Stihl Master
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Fuel starvation problem, check tank vent, and possibly clean and service carb.

Posted on Jul 31, 2013

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1 Answer

Chainsaw will not continue to run


Their should be 3 to 4 Carb adjustments "L" for low "H" for high the "I" for Idle, adjust the screws till their all the way shut and 1/4 turns each till it starts up, but if it starts as you say it does just adjust the Idle speed.

Dec 31, 2013 | Homelite Garden

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Chainsaw wont stay running


Get a carb. rebuild kit.

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My washer will start but only run for a few seconds......unless you hold the primer bulb in


The primer bulb has a pin hole in it:
This is what you need:
http://www.mymowerparts.com/partdetail/1079/14606.php

All local lawn mower repair / parts sources have this part in stock. This is a common issue with primer bulbs that you have to hold the bulb in so that it will run. When you do that your stopping it from drawing air through the hole in the primer bulb so it operates normally. Replace the primer bulb and it will be fine.

Thanks for choosing FixYa,
Kelly.

Aug 14, 2011 | Briggs & Stratton Gas Pressure Washer...

1 Answer

Poor gas in carb it starts and runs for a few seconds and then quits


If the saw has a primer bulb keep pressing this, the bulb will pull fuel from the barb and dump back into the tank, now drain the tank and start again.

Feb 18, 2011 | Garden

1 Answer

Fuel line keeps stallingoit after a few seconds


By your question, I assume that the fuel line runs dry after the engine runs a few seconds. The first thing to check is for a plugged fuel filter in the tank and the condition of the connecting fuel lines for rot, hardness, or cracking. If the machine has a primer bulb, does it pump fuel into it after several pumps? Remove the line from the primer that goes back to the tank to make sure it is pumping fuel from the carburetor only. If you replaced any lines, they may have been reconnected incorrectly. Hope this answers your question!

Apr 21, 2010 | Garden

1 Answer

Lawn mower starts and stops right away


take bowl off bottom of carb....clean and reassemble

Nov 16, 2009 | Garden

1 Answer

Starts and then stops after couple of seconds. will continue to run if I keep pressing primer bulb.


Most likely the high speed jet on the bottom of your carb is plugged.
not allowing fuel up into the venturi into the carb .

Oct 25, 2009 | Toro Garden

2 Answers

Ryobi 790r i have changed the gas line and the primer bulb . the primer will mash in 1 good time and then gets very hard to mash in . i fully choke it and it will crank but only for 3 seconds until it...


You cannot flood the engine by pushing the primer bulb too much, unless the hoses are hooked up backwards. The primer does not push gas to the carb, it sucks gas through the carb and returns it to the tank. Top barb on primer is the hose coming from the return side of the carb and the bottom fitting is the hose going to the return fitting on the tank. Look inside tank, it is the one without the filter on it, just a flange with a hole in the center.

If you can see gas and air bubbles moving through the primer and into the tank the hoses are on correctly. If you see bubbles going in the correct direction and then reversing when you remove your finger from the bulb, then the check valves in the primer may be bad. Replace primer.

When you say the primer "gets hard to mash", do you mean it is hard to push in or is it very slow to refill and return to the home position? If it is hard to push in and the bulb is full of gas and the hoses are on correctly then there must be a plug in the line going to the tank or the vent in the gas cap is not working. If it does not return, then it is most likely a plugged filter, plugged line from the tank to the carb, plugged screen inside the carb or a stuck needle valve. The primer is creating a slight vacuum to pull the gas through the carb, which is what the carb does when the engine is running. If there is a full or partial restiction on the supply circuit neither the primer nor the carb can pull enough gas for the engine to run. May need to disassemble carb and clean out any varnish, gunk or plugged ports/jets. Use spray carb cleaner. May want to think about a diaphagm and gasket kit if you do it yourself. If you do not feel confident in taking apart the carb, then take to a repair shop.

May 05, 2009 | Garden

1 Answer

Champion Vantage 35 - mower will not keep running


More than likely the jet in the carb is somewhat clogged. Did this just happen after sitting for the winter? If so, start the mower and when it starts to die pump the primer to keep it running. Sometimes it will clean itself in a few minutes. If not, carb cleaner or take the carb bowl off and clean the jet.
Hope this helps
Kurt
Pls rate the answer

Mar 20, 2009 | Champion International Champion& Small...

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