if it has the orginal engine its the KF-82 flathead which as far as i,m concerned is a good engine but its very hard to find some of the parts for it.......if you want to swap with a newer fe-290 you also need a retro fit kit whick adds 3 to 4 hundred to the project...........if its a good running engine you have now and you take care of it should last you for many years..................................