Thanks for the explanation. I guess the engines I have found the knock hard must be a lot more warn out so things in this instance don�t look so negative.
Followed your advice:
1) Checked the flywheel key (all good)
2) Decarbonised the head � It had a fair amount of carbon in it but its all clean now. There was a little/ tiny scoring on the bore but I don�t think its too much to be concerned about.
3) Rechecked the magneto gap � all good
4) Blade hub, crankshaft key etc, all check tight with no problems.
The engine wasn�t low on oil when I picked it up and it was relatively clean so things might be ok.
I didn�t encounter another problem that gave me the sh*ts. The primer bulb was leaking fuel again. I took the carby apart and re-set the float just a little past level with the frame of the carby (happy to be corrected if you think differently). I checked the needle to make sure it was seating correctly by sucking on the fuel hose connector and all good, no problems identified.
The last couple of tecumsehs havent caused this much trouble with the carb so it�s a little surprising.. maybe I just got lucky on the last couple.
I haven�t had a chance to give it a test after these changes but would appreciate any thoughts.
Thanks
Peter
