Well the Unimog turned into a bit of a adventure last night. After we dropped it off at my buddies house I ran home to get my wife so we could have dinner with his family, and then we could work on the unimog while the girls chatted. On the way to his house it had been running pretty rich, plus it had been sitting for quite some time. Initially it took about a hour and a half to get it running. The engine turns over very slow, (24 volt) and the mechanical fuel pump seems to be in its way out. Roy decided taking the unimog to church to pick up his boys while I was gone was a good idea, and I get a call from him just as I’m leaving my house saying he died on him. I pull up in the F350 and it’s dead, won’t start unless gas is poured in the carb and then only runs for a second. Pulled out some winch line, hook it to the Ford and pull it back to the shop. That thing doesn’t roll so good, so we couldn’t push it into the shop with the snow by hand, and the 24v winch wasn’t working, so I found a semi tire, set it on the back bumper of my truck and pushed it into the garage while also managing to finish killing my near death tail gate.
Get it in the garage, eat some dinner while it warms up (it was only about 10 degrees outside so my initial thought was that it has some ice in the fuel line.
Pull the fuel bowl off and it’s dry. Pull the fuel filter, dry. Look in the fuel tank and it’s 3/4 full. What the heck. Started tracing lines and found a t valve for the fuel tanks.
So this thing has 2 fuel tanks. You fill the front one all the way and then it over Flows to the back one instead of having a cross over down low like a semi. We switched the valve to the “reserve” tank which is the one with the cap and looked 3/4 full and nothing. Wouldn’t pull fuel. Put 10ga of fuel in it so it overflowed into the rear tank and it fired right up after a couple tries.
Gonna be a little bit of a learning curve with this thing. I’m thinking I want to add a inline electric fuel pump, and of course chance out that balance so I can get fuel from both tanks. And maybe add some kind of sight glass so I can tell how much fuel is in that back tank at a glance.