help my saws dont work

[offgridchris]

ive changed over to aspen 2 fuel and my ms880 runs badly and my ms250 wont even tick over. i phoned aspen and they haven't got back to me.then i found a thread on this forum explaining that i need to adjust the low carb jet. i tried this with no change. looks like my Saturday of sawing fire wood is not going to happen. any help appreciated.

[fergusonforestry]

we have had lots of running problems since changing over paticularly problems with seals one 200t has never been the same since

[GardenKit]

ive changed over to aspen 2 fuel and my ms880 runs badly and my ms250 wont even tick over. i phoned aspen and they haven't got back to me.then i found a thread on this forum explaining that i need to adjust the low carb jet. i tried this with no change. looks like my Saturday of sawing fire wood is not going to happen. any help appreciated.

You may need to adjust the low speed screw by about 1/8 anticlockwise to slightly richen the mixture, this should sort out the idling issue, The High screw should need no adjustment and is best left alone unless you absolutely know what to do.

 

Aspen contains no solvents so it will not have an adverse effect on the carburettors, but diaphragms which have been exposed to the solvents in petrol for a long time may shrink when Aspen is present. The ideal solution is to overhaul the carburettor if this happens, then it will run on Aspen perfectly from then on, just as new machines will.

 

To get you out of trouble for todays work, just revert to the (solvent rich) normal petrol, which should re-soften the diaphragms to the state they were previously in. The Aspen will not have done any harm.

 

It is very unusual to have problems with the switch over so please do not lose your confidence in Aspen.

I hope this helps.

[spudulike]

Just one little addition - you will find the idle will drop when richening the L screw, just locate and turn the idle screw clockwise to increase the revs back to even idle speed.

 

Make sure it is the idle screw you are turning:001_rolleyes:

[GardenKit]

Spot on!

[offgridchris]

thanks for the help. i tried opening the L screw and it hasnt helped. i reverted back to petrol for the time being although that didnt seem to help, then i gave up for today. im still going to use aspen i just wish i was told i might have issues. when it did work it did make a days chainsaw milling a lot nicer.

 

is it easy to service the carb myself?

[GardenKit]

thanks for the help. i tried opening the L screw and it hasnt helped. i reverted back to petrol for the time being although that didnt seem to help, then i gave up for today. im still going to use aspen i just wish i was told i might have issues. when it did work it did make a days chainsaw milling a lot nicer.

 

is it easy to service the carb myself?

I find it easy, but its what I do. If you have to ask the question then its probably best left to a skilled person, because if you get it wrong, especially the tuning, you can wreck the saw.

 

In defence of Aspen, its important to remember that saws (and other 2T machines) often need carb maintenance when run on pump petrol. I have been stripping, cleaning and re-kitting carbs for years before i even heard of Aspen. Your troubles may be just coincidental or due to the solvent issue I mentioned earlier. A good carb service will sort them out and you will be very pleased when they are running properly on Aspen

[Rob D]

thanks for the help. i tried opening the L screw and it hasnt helped. i reverted back to petrol for the time being although that didnt seem to help, then i gave up for today. im still going to use aspen i just wish i was told i might have issues. when it did work it did make a days chainsaw milling a lot nicer.

 

is it easy to service the carb myself?

 

 

May be worth getting one of the techie people on here to do a carb overhaul for you Chris.

[Theocus]

Aspen only works well with new saws as the diaphrams harden up with thier fuel. It will be a case as Rob said of repairing the carbs. My ms200 did this, i just stuck it straight back on normal fuel and used the aspen for assisting my bonfire!!!! lol

[GardenKit]

The ms200t is a temperamental saw, even with pump petrol it is prone to carb problems if the fuel is dirty, stale or just poor quality. When I fix them and explain to customers that their fuel may be at fault, they are often defensive of their fuel (and fuel managemant) with such comments as 'my fuel must be ok, all my other saws run fine'.

It is therfore amusing when I read these threads and see Aspen being immediately blamed for problems.

As I said before, there is sometimes the need to rectify existing problems in order to get the best from Aspen, but I have converted hundreds of 2T machines to Aspen with no problem, and many without any tuning.

Most carb problems with pump petrol are due to its INCONSISTANT nature, but Aspen is a CONSTANT, and therefore will cause less problems long term.