i just had this with 2 engines, i found these kits were the best way to go https://www.ebay.com/itm/Camshaft-f...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649won"t crank all the way , only with spark plug out, valves adjusted. valves move a good amount and cranked, don"t think its the cam, unless the lever is broken.