I have a little d31a dozen and it run prefect then one day I was running it and shut it off to get fuel came back and it was hard starting I finished what I was doing and on my way back home I noticed temp started climbing so I shut it down walked home got water but let it cool right off before returning and it took half a 2 liter of water and tried starting it and it cranked was blowing white smoke but wouldn't start I thought maybe fuell was the issue drained tank fuel lines and pump and out fresh stuff in and this time no smoke no nothing and starter sounded different like when a gas vehicle jumps trimming and no start thanks in advance
Could be a head gasket gone