or 35hp depending on what numbers I believe. AML35D millitary motor. Took the head off and the water passages have redish stuff..probably salt too as there is some white-ish crud in there. What do you use to clean the water passages? The cylinders had some dark spots that look like smudges and I can't feel any scoring with my fingernail. I decarbed it before taking it apart and there is black stuff on the pistons but not much on the head..one side of the head has more than the other around the sparkplug hole. This motor ran cold and rich and I am going to try and "demilitarize" it. I removed a "dewatering" valve and will put all the recirculation hoses back where the stock manual says they should be. What should I be on the lookout for when inspecting the parts? I want to put new pistons,rings and bearings in it,should I have it bored oversize? What is a good tool to measure the inside diameter of the cylinders? Don't know if it has ever been bored before.