ms 250 acting the maggot

[rowan lee]

Its a late 2010 saw, done very little work <30hrs. Well kept, dry stored, cleaned regularly, always clean mix etc. Dropped it in for a service, the idling setting needed adjustment as it wasnt ticking over correctly.

 

Got it back, and within half an hours worth of sawing, it suddenly cuts out in mid flight. Then it wont restart. Leave it for an hour, come back and it starts on choke setting, but will not idle for a second and conks out each attempt.

 

leave saw for a day, and it starts fine again, but will not idle properly for longer then 20-30 seconds.

 

Wonder whats up? Is it just the idle settings need a little more tinkering. Pretty ridiculous considering its just out from a service.

[spudulike]

Its a late 2010 saw, done very little work <30hrs. Well kept, dry stored, cleaned regularly, always clean mix etc. Dropped it in for a service, the idling setting needed adjustment as it wasnt ticking over correctly.

 

Got it back, and within half an hours worth of sawing, it suddenly cuts out in mid flight. Then it wont restart. Leave it for an hour, come back and it starts on choke setting, but will not idle for a second and conks out each attempt.

 

leave saw for a day, and it starts fine again, but will not idle properly for longer then 20-30 seconds.

 

Wonder whats up? Is it just the idle settings need a little more tinkering. Pretty ridiculous considering its just out from a service.

 

If it was a saw that I had serviced, I would have it back and resolve the issue free of charge and as a priority, the only time I would charge is if the fault wasn't due to the servicing I had done - so in short, take it back to your service agent and give him a detailed description of the fault.

 

If he saw had rolled in to my workshop with that fault, I would put the carb settings back one turn out WITH THE LIMIT CAPS REMOVED. I would set the idle using the idle adjuster and see what that gave me. I would then adjust the L screw and then tach the saw for top end running.

 

It sounds like the techie hasn't adjusted the carb properly - this can happen when the saw is tuned cold or warm and then used at the opposite end of the temperature scale so they should be happy to re-adjust if that is all it is.

 

The cutting out "mid flight" worries me though - was it in a full speed cut or just during idle? When a saw dies in a big cut? Does the compression feel good still?

[rowan lee]

Thanks Spud, I knew yuou would be on the case mate. Yeah the compression seems the same as always, its cutting away again, but you do have to give it the odd trigger rev inbetween cuts to keep the engine alive. Yes it did die in the middle of a cut, when I first realised there was an issue. But like i said, after 24hrs it started again and does cut perfectly fine.

 

They could have had a green apprentice on the case, the season is getting busy. I will bring it back, the only issue with that is the fact that I grabbed a bargain up in N.ireland at the time and its a 3 hr round trip, but it will go back soon.

[spudulike]

OK, it sounds like the thing hasnt fried, you could locate the idle setting and turn it clockwise unitil you have a decent idle speed, there will be two holes close together and one lower one away from the other two - sometimes labled "LA", this is the idle adjustment - it is on the clutch side of the saw.

 

Try turning it 1/4 turn clockwise and see if this sorts it, turning it in will increase idle speed and may easily cure your issues.

[rowan lee]

Ok - Im familiar with these two port holes you mention. (just never really had the confidence or need to tinker with these before). I'm sure I can't do a hell of a lot wrong if I give the LA a little tweek. I always assumed with settings like this that if you tweeked one, you would automatically have to tweek the other to gain a counter-balance of sorts? (Your method above sounds alot easier then adjusting drum brakes on the back of an old tractor!) Cheers Spud - Ill give that a go.