MS200T keeps flooding

[Matt]

Sorry if it's a silly question but my MS200T keeps flooding. I've been adjusting the carb and cleaning off the spark plug, it then restarts but it seems to keep doing it. Could it be anything else other than the carb? If not, I shall persevere trying to get the carb right. Any tips on that?

 

Probably all really obvious stuff but I'm still a newcomer!

 

Thanks.

 

Matt

[Bob Rolfe]

i would look at the breather on top of the fuel tank they break and fuel leaks out into the air filter its happen to me a few times and ive sent them to be fixed but i wouldnt mind knowing how to fix it my self because its a common fault if you drop the saw into conifers the twigs go under the air filter and damage it. bothe mine are broke with the same thing....doh

[Steve Bullman]

heres a tip....leave the carb adjustment to a pro or you may end up doing more harm than good.....theres only one guy i let near my carbs

[Mesterh]

i would look at the breather on top of the fuel tank they break and fuel leaks out into the air filter its happen to me a few times and ive sent them to be fixed but i wouldnt mind knowing how to fix it my self because its a common fault if you drop the saw into conifers the twigs go under the air filter and damage it. bothe mine are broke with the same thing....doh

 

There are about 4 different types of breather allthough a bit fiddly you can replace the knackered bits, the last design works well but it would require a new fuel tank.

 

As Steve says dont mess about with the carb settings if you aint sure what they do. On a stock saw they shouldnt need hardly any adjustment from the standard 1 full turn(3/4) if its a newer carb.Unless the carb is either knackered or theres a big air leak I which case it needs sorting.

[Tom D]

I've had breather trouble before but it did'nt lead to flooding just a wet saw handle. That does'nt mean yours is'nt the breather, but its probably the carb, If you've been playing around with it the settings may now be off now anyway but a poor pick up can sometimes be cured by backing off the L jet about an eigth of a turn, then another eighth if neccesary. Other than that I'd leave well alone, I do.

[Jonesie]

How old is the saw??

What letter is stamped on the carb??

[Dean Lofthouse]

Basic settings on stihl carbs if you have screwed up the settings is screw both H and L fully in the back out 3/4 turn. Then tune from there.

 

High revs should be done with a tacho ideally, but

 

Rev the saw on full throttle, screww the H jet slightly in or out until it starts "singing" ie revving high sweet as a nut, then turn the h screw in the opposite direction until the revs start to pop or hold back a little, ie it is limiting the revs.

 

Once you have the H setting right, adjust the L screw slightly one way or the other whilst quickly pulling the throttle from tickover. Until the engine revs with no dead spot. The adjust the tickover screw till the tickover is correct.

 

If the saw is fairly new leave the setting to a pro

 

Make sure you have a clean airfilter and new plug before carrying out settings. If none of this works then the problem is elsewhere

[Matt]

Cheers for the advice guys. It's an old saw that's had this problem since I got it. I did reset the carb back to basic setting and adjusted from there. I think I've been just not been getting it quite right, i.e. probably going too far past the ideal setting trying to get it to rev nicely. I'll reset and start again. I put a new spark plug on it but will have another check of the air filter.

 

Not sure of exact age or number on carb Jonesie as saw isn't with me now. I'll have a look later and post.

 

I'm intrigued as to why so many say leave carb alone. Why is that?

[rocky]

Because they don't understand carbs or know how to adjust it themselves. I'm constantly amazed at just how many people run chainsaws for a living and have no clue how to adjust or maintain them.

[Dean Lofthouse]

 

I'm intrigued as to why so many say leave carb alone. Why is that?

 

It only takes half a turn to get the mixture wrong resulting in too much air, not enough fuel, too many revs and piston seizure.