Stihl FS200

[spudulike]

Update from earlier posts:

Spoke to son & decided to go for new carb. Whilst waiting for this I compared the spark with an old ( Echo? ) strimmer & the spark was weaker on the Stihl. Dug out my old Danarm with a Kawasaki engine (bought new in 1979 & still works OK) & the Stihl spark was much weaker than that old banger. Hmmm, removed ring terminal & found enough slack in the plug lead to JUST manage to get a proper plug cap fitted. Spark now stronger, carb arrived, fitted & Bingo, starts first pull. Job's a good 'un - well - for son anyway. Me? I'm just perplexed because I STILL can't find anything wrong with the old carb... maybe I'll look for an old FS200 or MS181/018/017 just to see! Many thanks for the info down the line.

 

Possible blocked high speed check valve or low speed injectors but could also be a leaking Welch plug!