Question about Garden

1 Answer

My masport 600st lawn mower wont stay running it appears to have a blockage in the fuel line. What action do I need to take to fix problem

The mower will run for about 2mins on full revs and than die to about half the revs

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An user who is expert in 3 categories / brands.

  • Master
  • 1,917 Answers

You have a sticking float in the carburater you will have to get a carb kit for some carb cleaner any local auto store take off cleanit then let it soak in the cleaner 3 hrs hers the big you need a air compresser to blow air threw the carb little holes and big holes put it back to gather throw out gas install new gas and sea foam injecter cleaner 2 capsfull in the full tank you should be ready togo and have more power to

Posted on Jun 06, 2014


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 205 Answers

SOURCE: lawn mower keeps looseing revs

Dump out the old fuel, and with the air filter off spray the inside of the carburetor with carb cleaner

Posted on Mar 22, 2009

  • 10 Answers

SOURCE: starts, runs, and dies...starts, runs and dies...starts, runs, an

Sounds like a common fuel problem you need to remove carb & fuel tank and unless you can get a compressor they need a good blast out you may even take carb apart & check diaghram they have very small jets in fact most lawnmower shops have a sonic bath for this

Posted on Apr 25, 2009

#1 Taper
  • 1041 Answers

SOURCE: troy bilt mower won't stay running to cut lawn

You may want to check the gas cap to see if it clogged with dirt. If the gas cap is clear, you more than likely have a carburetor problem. If you need tips on carb. cleaning, feel free to ask.


Posted on May 30, 2009

  • 55 Answers

SOURCE: I have trouble with my Masport mower to keep it

you have a carberator problem. it needs to be rebuilt. first try drain gas and put new gas.

Posted on Dec 06, 2009

  • 2926 Answers

SOURCE: my troy built lawn mower dies after it starts runs

Your high speed needle jet is most likely the cause. Remove the jet and clean it out. Keep in mind that there may be least one or two very small holes drilled in to the sides of the high spped jet, if so, be sure they are cleaned and not clooged.

Posted on Jan 17, 2010

Testimonial: "worked perfect tks"

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Starts & runs for about 25mins stops & wont start leave it a while & it will start & do the same thing again

This is likely to be a fuel starvation problem.
Fuel is fed from a reservoir called the float bowl. This works pretty much like a toilet cistern with a float to cut off flow once it fills. Once the bowl empties and doesn't refill due to a blockage, the engine will cut out.
Clamp off the fuel line or turn off the fuel tap. Remove the bowl, unclamp the line or turn on the tap, and check fuel flows freely. If it doesn't, there is a blockage in the fuel line which you need to trace.

Another scenario is that the main fuel jet is blocked or semi-blocked. This can cause the engine to run ok when idling (since the idle jet is ok and not much fuel is required), but cut out as you throttle up. This is because more air is sucked in, but not enough fuel is drawn from the main jet due to the blockage. So the mixture is to weak and the engine stalls. The jet can be cleaned with compressed air or ideally a carburetor cleaning aerosol.

See my comprehensive guide for getting stubborn lawn mower or other small engines to start:


Mar 20, 2015 | Garden

1 Answer

Lawn mower will start and run for 5 seconds and shut down

will it stay running with your choke on? if so then clean your carb. if not then look for a blockage from tank to carb. ie fuel shut off, deteriorated fuel line. plugged filter etc

Oct 17, 2014 | Toro Power Lawn Mower

1 Answer

Wrong gas in lawn mower, what to do

if its a briggs and stratton engine with the plastic carb fixed to top of the fuel tank then you will need to replace the diaphragm and blow out the fuel pick up pipe

Jun 26, 2014 | Briggs & Stratton Briggs Stratton...

1 Answer

Masport 600st

remove your carb. have a flat clean spot to work. disassemble the carb paying attention as you do to where thing are. once you have remove the float bowl remove the rubber ring from carb or bowl(whichever it stuck to) remove your float being careful not to crush it or damage it. next remove the needle and seat if it didn't come out with the float. spray a quality carb cleaner through any and all ports or holes you can. some are dummy holes so expect some spray back (wear eye protection), blow carb out with compressed air only. no cloth or paper towel. reassemble in opposite order with new parts. make sure your float height is adjusted properly

Apr 19, 2014 | Garden

1 Answer

How do I clear a fuel line blockage on a masport 600st

try spraying some throttle body cleaner into the air intake. Let it sit for few minutes. Then spray in some starter fluid.

Apr 19, 2014 | Garden

1 Answer

Masport mower

few things to check fuel lines are connected properly one may have gotton losse offf or pinched then make sure the blades are in off position some its a lever or a pull/push switch and battery may have gone dead or distributor to spark or plugs

Apr 13, 2014 | Garden

1 Answer

Masport mower wont stay on high revs

Bad plug or gummed up carb.

Jan 22, 2012 | Garden

2 Answers

I've been trying to start my briggs & straton Masport lawn mower, after it was sitting idel for over a year. Replaced oil ok / added new fuel / spark working, however it dies after fisrt kick...

You probably still have old fuel and water in the carb itself.

take off the air filter and look for the bowl screw or clip *(depending on model)

You can drain the bowl and let some clean fuel run through the gas line as well.

If the new fuel was last years you might want to check the gas can for water as well.

I work at a mower shop and at this time of year we do a lot of these kinds of repairs.

Fuel today just isnt kind to equipment that sits around for any length of time.

Mar 27, 2011 | Briggs & Stratton Briggs Stratton...

Not finding what you are looking for?
Garden Logo

Related Topics:

39 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers


Level 3 Expert

708 Answers

john h

Level 3 Expert

15360 Answers

Are you a Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides