343R husky strimmer problem

[jojam]

after first fill strimmer started to become slow on pick up and not achieving max revs.after usual checks,air filter,plug,fuel filter and fuel pipes which are all fine i cleaned out carb,there was some dirt in the gauze.Put back together and and started strimming again,ran really well until end of fill,same problem as before,seems to occur when engine hot.Any ideas?

[spudulike]

after first fill strimmer started to become slow on pick up and not achieving max revs.after usual checks,air filter,plug,fuel filter and fuel pipes which are all fine i cleaned out carb,there was some dirt in the gauze.Put back together and and started strimming again,ran really well until end of fill,same problem as before,seems to occur when engine hot.Any ideas?

 

My brother has one of these - the baffle plate in the exhaust carboned up to the point, little exhaust was actually getting through it. I managed to get in to the exhaust and open the baffle holes and then put it back together again.

 

If the strimmer sounds a bit flat and quiet then it could be this.

[jojam]

Interesting,I'll have a look.

[pro bros]

had same problem with stihl blower was told to take exhaust off fill with petrol and burn out carbon ,be careful but now works perfect so done same with slow reving strimmer

[GardenKit]

If its the exhaust blocked then its usually worth getting a new exhaust, they are not usually expensive, and its difficult to clean them out properly.

 

While the exhaust is off, have a look in the exhaust port too, they are sometimes blocked or semi blocked with carbon. If so, then put the piston on TDC and scrape the carbon deposits out. Use an awl, or small sharp screwdriver. Be careful not to touch the piston though, and blow out the port before lowering the piston.

 

Excess carbon build up is normally down to the quality of the 2T oil and the ratio. Low smoke synthetic, or semi synthetics are best and keep the ratio to 50:1. Dont give it a 'dash' for safe measure. Also keep the engine revving, two strokes like to be revved.

 

Hedecutters are particularly prone to carbon build up as the dont rev hard or continuously.

 

Strimmers used on low revs, as well as on and off throttle suffer the same.

[WoodED]

had this on an ms200t... after we decoked the exaust it was a little screamer again

[jojam]

Thanks for the replays.not had time to look at exhaust yet but if it looks carboned up prob fit a new one as said they're not too dear.