power loss

I have a Kobota 3 cylinder diesel on a Grasshopper 721D mower. At random times (loaded or idling) it loses power then either recovers or stalls. It is very hard to start in that it sputters or lags before finally coming up to speed. I had the injectors rebuilt and tested but that did not help. I...

Hi, I'm wondering if you guys have any ideas on a problem I have with my little tractor: It's a Massey-Fergusson GC2400. I think a 24hp engine. Diesel. Under power everything will cruising along just fine 2400rpm.... All of a sudden the power drops, the rev's drop almost to zero, sometimes all...