UNIVERSAL M-25XP SHUTS DOWN
- Thread starter Debevoise
- Start date
Yes, on my M35B, to save the engine if engine oil flow is low or oil pressure is low, the oil pressure switch will cut the power to the fuel pump and stop the engine.
Joe, thanks for the reply. That seems like a good feature to have but it wasn't available on the M-25XP.
I recently changed the filters, and cleaned the one in the lift pump. My working theory is fuel starvation, so there are two issues I believe need to address: the possibility of crud in the tank blocking the pickup, or bad hoses that allow just enough fuel to get the engine started and not enough to motor anywhere.
I recently changed the filters, and cleaned the one in the lift pump. My working theory is fuel starvation, so there are two issues I believe need to address: the possibility of crud in the tank blocking the pickup, or bad hoses that allow just enough fuel to get the engine started and not enough to motor anywhere.
jssailem
SBO Weather and Forecasting Forum Jim & John
- Oct 22, 2014
- 23,502
The description of the engine shutting down in the original post sounds like fuel starvation is the cause.
If you have the same symptoms, my first action would be to ensure I have a clean fuel flow system from the tank to the injectors.
As @Stu Jackson has posted, depending on the type of fuel filters you are using, there may be a check valve in the fuel filter intake. That valve caused problems for Stu. You can find the issue/solution described here on the SBO forum. Search for "Fuel Check Valve" and Stu's name in the member block.
Other than that sneaky issue, the rest is straightforward. Open and clean all hoses and connections. Install clean new filters. Treat your tank to a cleaning, polish your fuel, or try to treat the tank with additives that will kill any diesel bugs, then flush them through your filters and replace them.
If you have the same symptoms, my first action would be to ensure I have a clean fuel flow system from the tank to the injectors.
As @Stu Jackson has posted, depending on the type of fuel filters you are using, there may be a check valve in the fuel filter intake. That valve caused problems for Stu. You can find the issue/solution described here on the SBO forum. Search for "Fuel Check Valve" and Stu's name in the member block.
Other than that sneaky issue, the rest is straightforward. Open and clean all hoses and connections. Install clean new filters. Treat your tank to a cleaning, polish your fuel, or try to treat the tank with additives that will kill any diesel bugs, then flush them through your filters and replace them.
I also just spoke with a local diesel mechanic experienced with Universal engines. He mentioned the fuel pickup hose and the possibility of a clogged filter in the tank. I'm going to try to pull it and inspect it today/tomorrow. It really is the final part of the system and I haven't inspected it yet.