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Problem is, the engine loses power after running for shot time (3-5 min.) Had the injector pump and injectors checked out by diesel shop. They checked out OK. Replaced new head gasket because the injector shields were replaced. Couldn't get old ones out without pulling the head. I pulled the muffler thinking it maybe rusted and coked up?
Still loses power after shot period of time. This is a Yanmar 3 Cylinder Engine (Modle=3TNA72UJ)
Grass is growing great. It's almost as long as a plush wheat field.