thanks grump.. i relise it couldent of been the pin cause the gouges are not in the same alignment as the piston pin !!! but when i said gouges in the bore you say scoring its actualy not scored these 2 gouges on each side are canyons and after looking at it internaly id prefure to stick to rebuilding the two strokes full crank victa's (atleast the they have removable barrels and no cam alignment) and yes i do agree with you i should just scrap and get a new motor or something , but if it only costs a few bucs for a new bigend bearing then ill do it the mower was a freebi.... the experiance is worth more than mower plus i recon the newer motors from briggs isent up to same quality as it was 20 year ago ... poor quality alloy id asume and poor workman ship ect. to keep cost down
but if you recon its not lateral slack in the crank bearings what could be causing the knock under load the thing sounds great at 3500rpm until you hit some ruff stuff, would to much valve lash cause it to happen ?
Last edited by steptoe; 17/07/11 09:24 AM. Reason: add more imfo
