Bought this H40D Pretty cheap, $700... Will start and operate, perkins sounds good, no smoke, no leaks on the shop floor, however, the engine comes up to operating RPM's and after about 30 seconds, will bog down and rev up again. Will die if left alone.

Unit has been sitting a long time and I'm going to change out the fuel filter, air filter, and diesel this weekend. Some added a small electric fuel pump in line between the tank and what I think is the engine fuel pump. Anyone know the wix fuel filter # I need? Any ideas what can be causing it to not stay running?

Also, there is a main junction block (connector) with a lot of wires under the floorboard with one wire that has been cut and bypassed and another that is disconnected, due to corrosion from what I can see. can anyone direct me somewhere that shows me where these wires go and what they do. Thanks, Joe.