Uh --- guys, it's an old .65 4-stroke. It doesn't make the same power as a modern 65 4-stroke & it certainly won't make as much power as a modern 40 or 46 BB 2 stroke. It will definately not overpower the plane. It will idle slowly & turn a nice big prop -- pretty much perfect for the job. ---and then there's that throttle thingy as well.