Originally Posted by RV Mech Tech
Les - I do not have the exact GPH spec but the fuel pressure for this generator is between 2.5 to 4 psi - anything more and it can cause flooding in the carb- also these pumps are 'self priming' types instead of 'gravity feed' style meaning that is has the capacity to pull fuel from the tank - not all pumps have this feature - the original fuel pump power wire is brown and you can test at that point for voltage when priming the pump - if you have at least 12.5 volts at that wire and the pump still does not work then the replacement pump has stopped working as well (making sure the ground is o.k if required) - the control board/module pump has a bracket that the two front screws secure as you described and the starter solenoid usually has its own fasteners - one other thing - if the fuel is not treated (for storage ) with fuel stabilizer fuel deposits can damage a pump such as varnish and gum deposits same as the carb that can plug up and this is another possibility- try tapping the pump body and see if it starts working - one of the reasons for using a non Onan pump is the cost -aftermarket pumps are less expensive (usually) - so check for fuel at the inlet of the pump, check for full voltage at the pump wire as well and make sure you have enough fuelin the tank - also if a non self priming pump was installed it may have taken longer to prime it and may have damaged it - this is only speculation - verify everything and let us know what you find - also if you want to get a factory manual ( it has all the updated information including wiring diagrams ) take your Spec and Model number of the front decal and you can get one through Onan - very valuable to have.
Hi - time to close this issue. Due to waiting for parts, pre-Holdiay trips, Christmas trips, etc, I finally got this work completed last week - new OEM fuel pump & filter and new fuel lines from the tank. And the generator fired right up. My guess is that the replacement non-OEM fuel pump was at fault, it makes no difference the cause of the fault, as long as the unit functions.
Thank you all for your input.