Hello there,
I have had the above strimmer for many years now and I am very happy with it, however I recently started it again after the winter and found that although it started and ran OK at low revs, when I rev it up, it seems to not reach full speed and splutters a bit. I have looked at and cleaned the plug and it seems OK, - a light brown colour and as I said it starts and ticks over OK. When I removed the cover and the carburettor and looked down the throttle, I could see that the throttle valve was fully opening and the choke was OK, but at full throttle there was a spray of petrol which did not seem to be sucked in as I would think should happen, in fact the filter was wet with petrol when I took the cover over the carb off. I blew out the carb with compressed air to remove any blockages, but it still behaves in the same way. I bought a new plug, but it is still the same.
Before I go any further and dismantle the engine, which I am reluctant to do, as I can see through the inlet hole that the piston seems in very clean and good condition, do you have any suggestions of what could be wrong? I stopped the flow of petrol and it did not speed up before the engine stopped, so I do not think that the mixture is too rich and it certainly does not look too lean. I have a full workshop and so do not have any problems with mechanical work, should this be needed. Do you think the problem is electrical, fuel, or mechanical? Does this engine have a reed valve in the inlet anywhere?
Any suggestions would be appreciated. Thanks.
George Bell.