Herbert Goff
New User
I did a complete rebuild on a TO-30 ferguson z-129 engine, including sleeves, rings, pistons, new crank and cam plus gears, rebuilt the oil pump, and had new vavles, seats, and guides installed plus had the head checked for leaks. I also had to buy a new intake, exhaust manifold. After all was put together, it would not start. Timing was checked and it was right. We checked compression on all 4 cylinders and they were 45 to 50 lbs. We tore back into the engine and redid the head with different seats and reassembled. It started, but the governor was stuck so we shut it down and redid the linkage. Now it will not start again and compression is low again. The head was checked for warpage and we ran a pressure test. All 4 cylinders held 17 which is right. We also changed the head gasket both times, so that is not the problem. Everything was torqued to specs. Does anyone have a clue as to why the compression is low.