spudulike

The BIG question is...have you swapped out the fuel lines and fuel filter? The McCulloch alloy fuel filter caught me out once...it looked near new but was stuffed full of alloy oxide corrosion once I got it apart. Other than that, remove the H&L screws and get some cleaner sprayed down the holes. Try undoing the H&L screws 1/2 and then 1 turn to see if it kicks the machine in to life. Manufacturers often tune their machines on the side of lean to meet emissions and after a while, they run a bit lean. As always...make sure that the gauze strainer is new or clean. Remove it to check the thing as I once had one that had a scum in the open areas but it looked clean until I took it out. Lastly - don't discount the plug...if Chinese, junk it and replace with a known good one to see if it is faulty.

When you finish the tree related stuff at the end of the day, do you then need to change to your van driving pants and then your sofa lounging pants when you make it home? Just a thought

With lyrics like "An emergency stop I smelt the last ten seconds of life I crashed down on the crossbar And the pain was enough to make A shy, bald, Buddhist reflect And plan a mass murder" And..."I would go out tonight but I haven't got a thing to wear plus a bit of Johnny Marr on the Telecaster.... overrated....really!! Oasis In can sort of understand.

Nope, that was Elton Johns Step in to Christmas!

Was he the fella arrested for arranging a hit on someone a few years back? Shame, all our childhood heroes are fading away.

I think some of you must be deaf. Personally I can listen to Mozart or Motorhead and find something to like about both genres. Abba, Carpenters, Burt Bacharach, Zep, Thin Lizzy, Whitesnake, Faure, Bruch, Mozart, Linkin Park etc.....all have written some fantastic riffs, tunes, songs etc Overrated...much of this modern tat that is totally forgettable.

Well Christmas is coming so if the family have twisted your melon and the TV is shocking then having a bit of a fiddle with this bit of kit sounds like a happy retreat to me!! This PDF may help you: - https://www.motoruf.de/mo/ersatzteillisten/FTP/McCulloch/Ersatzteillisten/IPL, McCulloch, PM2000, PM2100, PM2500, PM2600, GT40-42, GT50-52, Prefix 03, 1997-09, Brush Cutter.pdf

Funny but I did that for my neighbour as well as I couldn't stand hearing it any more. The funny thing is that he knew it was going to drive me mad and I would be round to fix it.....we do get on well. The fuel emulsion tube was blocked on this one.

Try looking at the top AV mount - the one by the airbox. The coil wiring can chafe on the AV mount and then short the kill wire out. 262 - nice machines!!

No, it would run but the idle would be pretty crap from the air leak via the impulse connector. The ones I had in were for stalling and poor running and were deposited to me as such. You have to remember that we are technicians so when we pick up a saw and use it, we get sensory overload from the number of pulls it took to start, the length of time for the idle to settle, the sound of the engine, the pickup of the engine, maximum revs, the sharpness of the chain, the point the clutch bites and starts the chain spinning, the oiler output etc etc When the average guy picks it up they register....it seems like it may run, oh great...it has started.......cut some wood and they are happy it is sort of running sort of. That is why we get machines in that a muffler has "Just fallen off" or..."I think there is something wrong" when the saw looks like it has been dragged out of the village pond!! Our perceptions are very different and we notice all the shyte that would worry others poor heads.

That is Cod wood not Cord wood you mullet!

As the previous post, there are two pins, one each side of the stove and the baffle slides forward pivoting on the two pins and the front edge nearest the front of the stove is pulled down in to the stove until the baffle is out and sitting on the bottom of the stove where it can be removed from the stove.

With these sort of machines, they generally get 1 hour. I check the diaphragms, change if hard, replace fuel lines and fuel filter and this generally will get a machine running if nothing else major is bad...I would obviously check for this before proceeding as you have. If your diaphragms are hard and crispy, it is unlikely you will get them supple again which means the machine will flood or never fuel the machine correctly. If the fuel lines are thin ones, you can often just open up the fuel tank holes and fit quality nytrile Stihl fuel line....an easy and cheap mod. If the machine has a solid shaft, generally it is a good sign but a cable type and or a curved tube means cheap homeowner. If your head is not spinning once running, it may be the clutch shoes are rusted shut. I got an old Zenoah Straight shafted strimmer going around 12 years ago and it still gives decent service.

If in Hertfordshire, Days Bakery do about the best mince pies, not cheap but the best. Home made brandy butter all the way!

Try sticking a bit of Aspen on a cloth and rubbing a greasy work bench with it. It has a real ability to cut through the grease, a bit like brake cleaner does. I would say if everything else has failed then it is possible it could work and worth a go if you have some lurking in your workshop. What sort of ultrasonic cleaner has been used, Was an additive used in the water, Was it a heated? Can it blow holes in aluminium foil? I Usually take pretty much everything off the carb and stick it in for 30 mins, use a bit of carb cleaner, brake fluid and WD40 on it and then do it again and repeat until you are pissed off!

Not again, I will carry on calling you Doubting Thomas!!

It will be the impulse line pulled from the cylinder. I once had three MS260s in over two weeks and ALL had the same issue as this one with similar symptoms. An easy fix and usually happens when the bar gets compressed in the cut and the operator gets a bit enthusiastic pulling it out. As Gareth said - check the AV mounts on the machine to make sure they haven't failed and made this happen. Swap the impulse line out on the next full service.

Yup, that's the one, the sticky brown stuff would get stuck round your teeth. I am trying to remember if they served it with the thin runny custard or not or just evap milk Funny thing is I only remember 1 or two fatties in the whole school. Most were pretty much thin, normal or stocky builds. I guess those puddings didn't do us any harm!

If the FAX doesn't work, try carrier Pigeon and no eating it...it isn't big or funny

Ah....a Kent Dessert....that was where I had it at school and it was sickly for sure.

The only comment on school dinners I have is "What was that Gypsy Tart stuff? I only had it at school and have never seen it before

No change of thought here as I have had them in bits before so know how they are constructed. All they do is to stop any high speed circuit action at idle so the low speed circuit can do its thing by itself. In regards to the "So crud could be either side of the flap to foul the working?" ....Yes, if the valve is stuck shut, the high circuit is shut down making idle fine but revving out near impossible. If you give a blast of carb cleaner down the H screw hole, you should get a good blast out of the check valve in to the carb bore.

My thinking is that with the engine running, there is air flow through the carb so if a venturi in the bore of the carb is open (an open faulty check valve), fuel will be pulled up through it. I know the check valve seals in the other direction but it still requires a reasonable amount of airflow for it to open as it would when the throttle valve opens from idle and enough air flow opens the valve. This is probably like discussing religion and isn't helping the fella fix his carb......like I said.....he is lacking high speed fuel....blocked high speed jet, blocked channel or a check valve that is stuck CLOSED or perhaps a diaphragm issue.

I distinctly remember one MS460 and the saw had no idle but would rev OK but the idle was non existent. I suspected the check valve was shot and a new secondhand carb resolved the issue. All you say about the check valve is correct and perhaps my saying the idle was very rich may have been an overstatement but the check valve breaks the carb in to two distinctive circuits to supply fuel at high and low revs. If the check valve is stuck open, the carb will be pulling fuel through the low speed circuit and high speed circuit so by my reckoning, it will be rich and adjusting the L screw won't resolve too much because the carb wasn't designed that way. The OPs carb may have a blocked high speed jet, blocked channel or a check valve that is stuck CLOSED or perhaps a diaphragm issue. The lack of high speed revs points me to a blocked high speed circuit.

An interesting comment. You could possibly put a mark on the ignition flywheel and strobe it to see if you get any form of advance and retard when the engine is revved....assuming the engine has some sort of advance/retard device or mechanism.