Hi, all just bought this I-177B Valve tester, 110volt, made i am led to believe by Simpson, Triplett and others, here is a You Tube film of the same type, supposed to be a darn good tester. It is a wartime piece of equipment, its a dynamic tester rether than an emission tester...Regards....Alan.
http://www.youtube.com/watch?v=GrWQMbm_c-4&feature=related
http://www.youtube.com/watch?v=GrWQMbm_c-4&feature=related







