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Acidman
02-03-2012, 03:38 PM
Hi all,

Whats the best method for clearing out a flooded engine?

The bike is a husqvarna wr 125 2 stroke.

Left the fuel tap on accidently when bringing it home in the back of the van, and now wont start.

I took the spark plug out last night and kicked it over a good few times, started but died after 5 secs or so, still sounding flooded.

Should i lay my bike down on its side to try clear out the carb? or do i need to fully remove my carb and check to see if the float is operating correctly?

midwood #96
02-03-2012, 03:41 PM
Try Turning the fuel tap off mate and kicking it with the spark plug in untill it starts up let it run out of fuel and stop then turn the fuel tap on and go from there hope this helps

Ash

Acidman
02-03-2012, 03:48 PM
It doesnt start up at all mate, the only way i could get it to start (briefly) was to take the spark plug out (it was wet and black), kick the bike over 15-20 times to attempt to clear out the head, dry the plug, replace and fire up.

There still seems to be fuel in the carb, and possibly some sitting in my exhaust?

swiss18
02-03-2012, 03:54 PM
Take the plug out and kick it over a few times. Dry the plug off but don't put it back in straight away. Take the carb off give it a good clean out and screw the air fuel screw in all the way and turn it out 1 and a half times then put it all back together and kick it over a few times should be fine. Might need to slightly adjust air fuel mixture again afterwards to get it spot on but it should run after that

Acidman
02-03-2012, 03:59 PM
Thanks bud ill give that a go, it was running perfect before we put it in the van to transport it, should i still adjust the mixture screw?

swiss18
02-03-2012, 04:05 PM
Thanks bud ill give that a go, it was running perfect before we put it in the van to transport it, should i still adjust the mixture screw?

I would mate if its flooding its running far to rich. But also check Ur spark. plug and ht lead first as if its not sparking it won't burn the fuel which will also make it look like its flooding. Would check that first to be honest. Take plug out of the head and put it in the ht lead hold it against the engine or frame to earth it then kick it over see if it sparks. If it does the do the things i told u too in my last post.

Acidman
02-03-2012, 04:14 PM
I dont think the bike running rich caused the flooding, i believe its to do with transporting it in the van.

I think something has happened in the float bowl (float stuck or something similar) and i think the bowls brimmed over the top and into my engine.

Its recently had a piston rebuild and is running a higher 2 stroke oil mixture than usual to help the rings bed in. Whether this makes a difference or not im unsure.

Acidman
02-03-2012, 04:14 PM
Also, i checked the spark when the plug was out and it seems spot on.

ian1
02-03-2012, 04:36 PM
just bump start the bike.will start straight off. if problem is flooding:roll:

dannyb
02-03-2012, 04:47 PM
You need a new spark plug mate

harrison27
02-03-2012, 04:56 PM
turn the fuel off and give it half a dozen kicks,that should clear any petrol in the bore.

failing that a bbq lighter down the bore but stand back abit.

if you rode it all day and now its not starting try a new plug first because its more than likely suffocated in oil,even after a good clean.

and possibly you've worn your rings down if you only used cheap chinese ones? so that it wont have enough compression to fire off the kickstart,so new plug and try kicking it...

if not try bump starting it,then report back.personally i wouldnt adjust the carb' as your previous settings are known to be working.

Acidman
05-03-2012, 09:18 AM
Still not had it running yet.

Ive tried everything suggested other than the BBQ lighter.

I think it may well be the spark, it seems ok testing it on the exhaust but as soon as i kick it over its wet through.

Tried bump starting it and it almost feels like its going to fire but never does.

The bike had just had a piston rebuild before i bought it, im not sure if its chinese but theres probably a good chance as ive seen kits on ebay for 45. If a new plug doesnt work do you think i should pressure test for compression?

Any idea what it should be?

James116
05-03-2012, 11:03 AM
Leaving the fuel tap on wouldn't flood the engine as the engine needs to turn over in order to suck fuel into the barrel but due to excessive kicking chances are its now flooded.

Ignition off
Throttle wide open
10kicks

Ignition on
Choke on
Of it starts turn the tickover up and let it idle for 5 mins

Acidman
05-03-2012, 11:22 AM
I didnt check the wires upto the coil but the plug was sparking so these must be working atleast?

I took the plug and and kicked it over numerous times but no luck. Still gets wet and oily instantly.

If the new plug doesnt help i will take a look at the piston and rings.

If the rings were knackered would petrol be getting into the transmission oil? maybe worth draining that to see?

It has had a top end rebuild recently, and i have the old piston which still looks in good condition. The lad started it up first kick before i bought the bike, but it did bog a little when i gave it a quick run, i assumed this was because of the rich running in oil ratio.

I guess if none of this works i will need to remove the barrel and check the piston size against it?

harrison27
05-03-2012, 11:47 AM
possibly your coil is breaking down under load.

also check to see if theres any water in your stator area.

try a new plug then check its sparking correctly,then compression test etc'

Acidman
05-03-2012, 11:53 AM
Cheers Harrison, massive help matey.

Ill try the new plug tonight and see how it goes.

riky2stroke
05-03-2012, 01:20 PM
Leaving the fuel tap on wouldn't flood the engine as the engine needs to turn over in order to suck fuel into the barrel but due to excessive kicking chances are its now flooded.

Ignition off
Throttle wide open
10kicks

Ignition on
Choke on
Of it starts turn the tickover up and let it idle for 5 mins

if you left the tap on,it could have flooded the engine.
ie,the big end will have fuel in it. that is why its called flooding the enigne.
if the tap is on,& the carb can overflow(transporting the bike in a van would do this),then the fuel will have got past your reedvalve & flooded into the big end.
if you think this could be the case,there is an easy solution.
you need to get the fuel out of there.
if you remove the spark plug,then get one of our mated to help you stand the bike on its head.
if you hold the front brake on & lift the back end in the air has high as you can,then push the kickstart a few times with your hand to turn the engine over. any fuel that is in the big end will spew out of the sparkplug hole.
if no fuel comes out,then your bike is not flooded.

James116
05-03-2012, 01:38 PM
if you left the tap on,it could have flooded the engine.
ie,the big end will have fuel in it. that is why its called flooding the enigne.
if the tap is on,& the carb can overflow(transporting the bike in a van would do this),then the fuel will have got past your reedvalve & flooded into the big end.
if you think this could be the case,there is an easy solution.
you need to get the fuel out of there.
if you remove the spark plug,then get one of our mated to help you stand the bike on its head.
if you hold the front brake on & lift the back end in the air has high as you can,then push the kickstart a few times with your hand to turn the engine over. any fuel that is in the big end will spew out of the sparkplug hole.
if no fuel comes out,then your bike is not flooded.

The float cuts of fuel at a curtain level if in transport the fuel would come out the over flow? Reeds are **** until the engine is running also? Feel free to correct me if I am wrong.

Acidman
05-03-2012, 01:56 PM
if you left the tap on,it could have flooded the engine.
ie,the big end will have fuel in it. that is why its called flooding the enigne.
if the tap is on,& the carb can overflow(transporting the bike in a van would do this),then the fuel will have got past your reedvalve & flooded into the big end.
if you think this could be the case,there is an easy solution.
you need to get the fuel out of there.
if you remove the spark plug,then get one of our mated to help you stand the bike on its head.
if you hold the front brake on & lift the back end in the air has high as you can,then push the kickstart a few times with your hand to turn the engine over. any fuel that is in the big end will spew out of the sparkplug hole.
if no fuel comes out,then your bike is not flooded.

Wouldn't the piston + rings stop the fuel dropping down into the bottom end?

I see what you mean about fuel flooding the engine when its been transported, but if theres fuel in the bottom end i think theres a problem with the piston itself.

riky2stroke
05-03-2012, 02:30 PM
depends where abouts on the stroke the piston was when you turned the bike off last time.

riky2stroke
05-03-2012, 02:40 PM
The float cuts of fuel at a curtain level if in transport the fuel would come out the over flow? Reeds are **** until the engine is running also? Feel free to correct me if I am wrong.

the reeds are only fully sealed when the engine is running & under compression.
they do not spring shut air tight when the engine is shut off.
fuel can easily get past.
i have sorted this problem out before for plenty of people.

alot of people say their engine is flooded,without properly understanding what it actually means.

try standing your bike on end & see if you can pump any fuel out of the plug hole.

if there is no fuel in there,its not flooded.

Acidman
05-03-2012, 03:20 PM
so if the piston is at BDC then fuel can just piss through to the bottom end, seems strange?! would it not knacker your big end bearings?

riky2stroke
05-03-2012, 03:35 PM
Tdc.not bdc.
Or it could be running through the transfer ports.
It does happen.
You should always turn your fuel off on a 2 stroke when you park your bike up.

Acidman
05-03-2012, 03:49 PM
Ok cheers for the advice, would the petrol be mixed in with my transmission oil then, could i just drain that instead of tipping it upside down?

riky2stroke
05-03-2012, 04:05 PM
no. the fuel cannot get into the transmission side. there is a crank seal to stop this.
the big end on a 2 stroke engine is sealed . you need compression in the bottom end of a 2 stroke or it wont run.

trust me,standing you bike is the easiest way.
either that or remove your cylinder.
i know which i would rather do.

Acidman
05-03-2012, 04:08 PM
ok i will give that a go, my engine knowledge is quite limited.
Do you mean having the bike fully upside down?

Will the fuel cause any damage to my bottom end? is this just lubricated by grease?

riky2stroke
05-03-2012, 04:16 PM
no.it wont cause any damage.
the petrol will wash some of the lubrication away ,but i wouldn't worry too much. asoon as you get it running again,it will get lubricated.
the 2 stroke oil in the fuel lubricates all the moving parts.

you dont need to have the bike fully upside down.
what i normally do is get someone to help me.
if you hole the front brake on(you could use a zip tie).
then lift the back wheel up as high as you can.you want the bike as vertile as poss.
then with the spark plug out,pump the knickstart a few times to spin the engine over.
if there is a load of fuel in there,it will come pissing out of the plug hole.

its not as hard as it sounds.
when you have the bike lifted up,it will balance quite easily.

i used to have one of those husky wr125's when i was 17.
it was pretty quick after we removed the restrictors out the exhaust.
but the powervalve do brake twice while i had it.

Acidman
05-03-2012, 04:22 PM
Thanks buddy, i will do that tonight before i put the new plug in, and hopefully she will fire up!

How did you find the bike?

and how did you know that your powervavle broke did it just run dodgy or not start up etc?

Its the first real two stroke ive owned so ive never really know alot about them.

Despise
05-03-2012, 04:58 PM
Dont have time to read all the comments but im sure someone would of answered this.

Take the plug out, drain the carb, fuel tap off, kick it over a dozen times, take the exhaust off or get the bike vertical to drain any fuel in there out.

Then leave the bike over night to dry out (spark plug still out) - quick way is to use a hairdryers or equivalent, get some heat in there to evapourate the excess.

In the mean time, get yourself 2 new spark plugs, that plug will be pretty much dead. Next day or after hairdryer, new plug in, exhaust on, fuel tap on, kick it over, shud fire up after a few :thumbs:

riky2stroke
05-03-2012, 07:21 PM
How did you find the bike?

and how did you know that your powervavle broke did it just run dodgy or not start up etc?

Its the first real two stroke ive owned so ive never really know alot about them.[/QUOTE]

the bike just stopped.
the power valve on the husky's are like suzuki rm's.
they are a pluger type.
the powervalve snapped & totally f**ked (f@ked) up the bore.
& it didnt do the crank any good either.
but i did use to nail it everywhere.
if you take care of it,& dont thrash it permanently,it should be a good reliable bike.

is yours a wr,or an sm?

katoom
05-03-2012, 07:42 PM
Don't put more oil in with the fuel when running in, just mix it as usual.

k80m_paul
05-03-2012, 07:47 PM
sounds like you fouled your plug rather than flooded the engine.

new plug will get it running again but you also need to check your jetting to keep it from fouling again

Acidman
06-03-2012, 08:47 AM
Cheers for the advice lads, the new plug worked a treat and fired up straight away :)

its a wr by the way!