Take look at Harbor freight engine Grayhound 6 1/2 hp overhead valve engine if download there cupon on ste take to store engine be 79.99 if use on farm there no tax most places. I've used mind secse novomber 2008 on 1973 year model with no problems more power than needed. Easy change out this engine Honda knockoff from china made just for Harbor Freight. you need buy 4 new bolts mount engine because metric same length as old and one bolt holds on pulley this bolt sae theads I forgot if nc or nf theads an 5/16 bolt same length as old one.