MS261-C (m-tronic) Hot -won't - Start

[Bob_z_l]

Hi All,

 Recently ( in the last few weeks) my saw won't start when it's hot. I've tried to "reset" the carb by starting from cold and running for 30sec on choke. Then switch off and start normally and run for 30 sec+ with no effect.

The only way round is to leave it ticking over for ages which I don't like to do.

I'm a hobbyist so the saw gets plenty of use in the winter weekends and an hour or so a day in the spring/summer /autumn and all weekend. All so far with out issue. Saw purchased 2016

 

 

Is it a fixable defect or back to the shop?

 

Thanks Bob

[thetoolnut]

Back to the dealers i'd say, they'll plug a diagnostic cable into the carb and that will tell them what's going on.

[nepia]

I've seen it written that you can kind of reboot the carb setting software by working the saw flat out in some big wood for about 5 minutes - really work it.

Might at least be worth a go before taking it back.

[john p]

Will be the fuel solenoid I reckon, £16 part, easy to fit

[Bob_z_l]

 

11 hours ago, john p said:

Will be the fuel solenoid I reckon, £16 part, easy to fit

Thanks....I'll have a look.

 

13 hours ago, nepia said:

I've seen it written that you can kind of reboot the carb setting software by working the saw flat out in some big wood for about 5 minutes - really work it.

Might at least be worth a go before taking it back.

All out of stuff to cut, but I'll see if I can give it a go.

 

 

Many Thanks

 

Bob

[STIHL GB]

Hi,

 

If you want to do a M-tronic reset on the MS 261 C-M, start the engine, leave it on idle for 90 seconds and then switch it off. Do not rev it during the reset process.

 

Hope that helps.

 

Paul

[Bob_z_l]

1 hour ago, STIHL GB said:

Hi,

 

If you want to do a M-tronic reset on the MS 261 C-M, start the engine, leave it on idle for 90 seconds and then switch it off. Do not rev it during the reset process.

 

Hope that helps.

 

Paul

Many thanks Paul

 

I have yet to give it a go but I will in the next couple of days.

 

 

Bob

[Martin du Preez]

Fuel solenoid, mine does it occasionally, if you're feeling brave and strong just drop started it with finger on throttle

[Bob_z_l]

oops

 

Edited April 25, 2018 by Bob_z_l
speling

[Bob_z_l]

Hi All,

Again, Thanks for this. My parts diagram doesn't show a fuel solenoid and I get no hits on any internet searches.

Can anyone supply a part number , or better a link to the service manual.

 

I have this one...but I don't think it deals with m-tronic.

 

MS261_parts.pdf