Onan fuel pump is noisy
Just bought a 1999 36 ft Holiday Rambler with 18,000 miles. The generator stop working the 1st day I brought it home. The Onan 5000 was not getting any gas. The coach tank was at 40% and I am not sure...
Forum Discussion
The pressure from these pumps come from a spring loaded piston/solenoid that is cocked by a 12 Volt pulse a number of times per second. A normal noise response can be louder on first couple of pulses but should quiet down as the piston has little or no movement by virtue of the fuel flow being blocked by the carb float.
If a pump is noisy it may be because the fuel is leaking by the piston rings and not building a fuel pressure so the piston continues to move a full stroke on every 12V pulse.
If a pump is noisy it may be because the fuel is leaking by the piston rings and not building a fuel pressure so the piston continues to move a full stroke on every 12V pulse.
