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When i start up the bike it runs ok for a while then cuts out i have put new spark plug in fresh petrol with correct 2 stroke mix not sure how to adjust air screw i know where it is

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Try leaving it running while you adjust the air flow and see if that works. Hope i was of help to you.

Posted on Aug 03, 2009

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With apprila Rs 125cc 2 strokes bike. I fill up with 98 octane unleaded and I poured 2 strokes oil Into petrol tank. is it possible can damage the engine?. at the moment I couldnt start the engine.


well you cant damage it by doing that but if you put too much n and didnt shake it well it will settle at the bottom of the fuel tank and fill the carburettor up with oil as oil is heavier than petrol.why are you not using the oil tank and oil pump fitted to the bike ?best thing to do is put a new spark plug in it turn the fuel tap off roci the bike bacwards and firwards to mix the oil and fuel in the tank,and drain the carburettor by undoing the 14mm nut in the centre of the bottom of the carb,then turn the fuel back on and try and start it up.

Dec 10, 2015 | Motorcycles

1 Answer

Ses doo 2013 grx limited 260 wont start Why


The internal combustion engine is quite simple. All you need for it to run is compression, fuel & a spark to ignite it. I'm not saying it'll do 40 MPH but it should start & run. If it doesn't then one of the 3 elements is missing.
You need the following - sounds stupid but it wont work if one of these is missing.
1. PETROL - fill the tank to be sure. If its a 4 stroke just petrol. If its a 2 stroke petrol & 2 stroke oil mixed or top up 2 stroke oil tank.
2. Fully charged BATTERY. Clean connectors on battery tops
3. a SPARK at spark plugs. Clean them while they are out. If no spark look for dodgy coils, plugs, HT leads, triggers.
Look for air leaks in fuel line - if bulb does not go hard you got an air leak. Does it smell of petrol? check for leaks in fuel line & around carbs, look for perished fuel line, loose clamps or if they are jubilee clips, they could be too tight, crushing the anti-syphon valves at the primer bulb. loosen them until squeezing the bulb scoots fuel out then re-tighten JUST enough to stop fuel leaking.
Does it turn over? - then battery ok & not seized
Does the choke operate? operate lever & confirm things turn properly on carbs.
Once its started you can fine tune it but it needs to start first!!

Jun 10, 2014 | Boating

1 Answer

Is a Victa Sunbeam 160 Special a 2 stroke or 4 stroke? Wondering what additive to use with fuel. Thanks so much for your help.


hi there tanyajames88

your victa is a 2 stroke vc160 these units sare stated to run 25:1 fuel / oil ratio

that is 40 mils of 2 stroke for every 1.0 litre of petrol that mix

so if mixing 2 litres - 1st put in 80 mils of good quality 2 stroke oil then put in 2 litres of petrol , give good shake and fill up your mower tank

2 stroke oil that you would use for sthil chainsaw would be ok its hi quality

you could use some fuel stabilizer additive to hekp stop mix from going stale too soon
if wish but most times just mix enoyugh mix to het job done , then mix more if need it

that way mix is always fresh

vheers pauly46

May 29, 2011 | Garden

1 Answer

I put 2 stroke and unleaded mixed in my dt 125 but i have a seperate tank for 2 stroke,it started to smoke then cut out and now it isnt starting and is not gettin a spark


Putting fuel mixed with the oil shouldn't hurt anything, you must have just fouled the plug, get a new plug in there and see if it fires. NGK is the best for 2 stroke.. If it fouls out again, drain the tank or most of it and put in fresh gas, it should clear up. The mix is very slight with the injectors running, I had oil injection on my old Saab and used to put in the premix all the time just in case, always had extra plugs with me cause they always fouled out. My wife would come home and say whats for dinner, i would have the spark plugs in the oven baking.

Feb 28, 2011 | 2000 Yamaha DT 125 R

1 Answer

Bike been laid up for 5yrs....have stripped and cleaned carbs, cleaned fuel tank out. Plugs sparking ok but bike not even attempting to fire.


Have you any compression? If not, pour a few ounces of motoroil in the spark plug hole to place some oil on top of the piston and let it soak for a day or so. Fit an old spark plug and check compression. It should be good now. Turn the engine over a few times to blow the excess oil out and fit a new plug. After checking the petrol and oils is mixing OK and the carb is "wet", try starting again.

Make sure the gear box has fresh oil and any hydraulics have fresh fluid.
Hope you get it going.

Dec 14, 2010 | 2001 Hyosung GV 125 Aquila

1 Answer

Hard starting runs for a while and loses power and dies very hard starting after


Check for blue, snappy spark (gapped 0.020") at the spark plug. Check the fuel filter, air filter and muffler for plugging. Check the fuel lines for decay or other damage. Make sure the fuel mix is correct and fresh. Make sure the primer bulb (if equipped) pulls in fuel after several pumps. Check the carburetor fasteners for tightness. Make sure the engine case is free of sawdust to prevent overheating. Check the chain oiling--it should throw off a thin line of oil onto some cardboard from the bar tip with the engine running fast for several moments. The engine should 4-stroke at speed while unloaded, but immediately 2-stroke when cutting. Adjust the H jet needle to achieve this. Set the L jet needle so that the engine 'follows the throttle' and idles fairly well. Hope some of this helps!

Aug 07, 2010 | Garden

2 Answers

Hot chain saw wont start


When it won't start, remove the spark plug, lay the base on engine metal with the wire on, and pull through. The spark should be blue and snappy. If nothing, try a fresh plug. If still nothing, the ignition module may be failing with heat. Try blowing out sawdust from the engine and case with compressed air to improve cooling. Does the engine 4-stroke when not cutting, but immediately 2-strokes when cutting? Check the air cleaner and muffler for plugging. Make sure the carburetor fasteners are tight. Hope some of this helps!

May 01, 2010 | Garden

1 Answer

It is firing from the spark plug but will not attempt to start . this is a poulon pro 42cc chainsaw.


Try a squirt of starting fluid in the plug hole, replace the plug and try to start. If you get a pop or two, then you have fuel problems. Make sure you have fresh fuel mix in the tank. Check the condition of all fuel lines including the in-tank line plus the fuel filter for plugging. Check the muffler and air cleaner for plugging. Does the engine seem to have good compression? If everything looks ok, then it may be time to disassemble the carburetor, clean and re-kit it. Set both needle jet screws initially at 1-1/2 turns out CCW from the CW stops (lightly). The engine should start and run--allow to warm up. Pull the throttle full on and adjust H CW until the engine runs faster, but is still 4-stroking. The correct adjustment is for the engine to 4-stroke, but immediately 2-stroke when cutting. Release the throttle and adjust L CW for fairly smooth running, yet allows the engine to 'follow the throttle'. Set idle speed screw to stop the chain from turning at idle, but keeps the engine running. Hope some of this helps!

Apr 16, 2010 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

MacCulloch 839 Petrol Chainsaw.Erratic running


Check the fuel filter, air cleaner and muffler for plugging. Warm up the engine first. Pull the throttle full on and try turning the H jet needle CW with the engine 4-stroking, but which immediately 2-strokes when cutting. This will not produce the highest speed, but will produce the most power and least heat. Be sure to use fresh fuel mix at all times. Hope this helps!

Mar 29, 2010 | Garden

1 Answer

I just bought a 2 stroke 49 cc atv. Everything was working fine untill the engine just cut out. It started once or twice after several pulls of the cord but cut out soon after once again. PLEASE HELP, i...


hi mate are you mixing the bike with 2 stroke if not buy a mixing bottle with a ratio of 32/1 on ebay and buy 2 stroke and mix it up with petrol and oil if not the engine will seize also take the spark plug out and give it a clean with a wire brush and check the gap is ok and then put it in the plug cover and put the plug against the cylinder and turn the engine over and see if there is a descent spark if not replace the plug good luck

Jul 21, 2009 | Fender 2 Stroke Full 49cc ATV # ATG-47B...

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