I have a L2900, got it with a hole on the block at only 300 hours, the hole is just above the starter and it looks like the rod broke and banged around good inside before it found an exit. I need a complete engine replacement, to make things easy, unless I find a short block with good crank etc that I can just bolt my upper parts on. From looking around I think a 1503 1703 maybe an 1803 will work best. Any help on what engines to look for is greatly appreciated.