Broke what gasket,?? did ya take the 6 bolt side cover off ?? thats the PTO cover?? if so...thats a common item, 44 cents at napa... and old 420s arent bad on leaking gaskets,,, a small dab of silicone for a top cover gasket will work even without a gasket,,,or the loctite plastic gasket.. sounds like a bearing noise,,??? if its not jumpin outta any gear its probably not serious...usually if a mainshaft bearing is gone,,,or goin real bad,,,it will be a difinite noise,,,and jump outta gear too...bearings allow the shafts and gears to align and mesh so outta line will make them noisy... the old trick was fillem fulla sawdust and sellem...LOL.. it got sawdust in it..??? LOL...bearings and gaskets are easy to come by for them....gears are hard to find.......new anyway...
