Show Posts
1
General Discussion / Re: My Generator Needs A New Fuel Pump
« on: March 17, 2021, 11:33:43 pm »
Hi Ron,
I just joined the forum and don’t know if you solved your genset’s possible fuel starvation issue but I thought I’d offer my experience with my genset’s fuel pump issue. Might help someone else.
I believe your generator's symptoms were exactly as mine experienced 18 months ago, and indeed, replacing the pump cured the problem. Once I felt there was a 'pump plus run time heat' relationship, I intentionally tested the hypothesis over two days of cycling the starting of the generator, first from dead cold. It would run 20-30 minutes before quitting. Let it rest for 1/2 hour and it would run again but now only for 5-10 minutes. The shorter the rest periods, the sooner it would quit. Same processes the second day = same results. On two occasions when it quit, I did pull the fuel line into the carburetor and no fuel came out of the carb as the bowl was empty. I felt it had to be the pump.
Along with replacing the air and fuel filters, I replaced the fuel pump. Though not hard to do, the effort was more stressful (to me anyway) than installing the heavy-duty sway bars F&R and/or the SUMO Springs (Solo on front, Maxim on rear). I really didn't want to damage the green colored printed circuit board that had to be moved to gain access to the pump related stuff routed underneath it. And there is twisting and turning the board "just so" in order to get it back in place. Indeed, it is a DIY but it takes one's time and patience. I added extra long electrical leads for future use should it happen again. I would just abandon the faulty one in place and mount a new pump and filter outside the Onan box next time, hence the long leads.
Good fortune to you and thanks for all your sage advice and insight.
Steve
I just joined the forum and don’t know if you solved your genset’s possible fuel starvation issue but I thought I’d offer my experience with my genset’s fuel pump issue. Might help someone else.
I believe your generator's symptoms were exactly as mine experienced 18 months ago, and indeed, replacing the pump cured the problem. Once I felt there was a 'pump plus run time heat' relationship, I intentionally tested the hypothesis over two days of cycling the starting of the generator, first from dead cold. It would run 20-30 minutes before quitting. Let it rest for 1/2 hour and it would run again but now only for 5-10 minutes. The shorter the rest periods, the sooner it would quit. Same processes the second day = same results. On two occasions when it quit, I did pull the fuel line into the carburetor and no fuel came out of the carb as the bowl was empty. I felt it had to be the pump.
Along with replacing the air and fuel filters, I replaced the fuel pump. Though not hard to do, the effort was more stressful (to me anyway) than installing the heavy-duty sway bars F&R and/or the SUMO Springs (Solo on front, Maxim on rear). I really didn't want to damage the green colored printed circuit board that had to be moved to gain access to the pump related stuff routed underneath it. And there is twisting and turning the board "just so" in order to get it back in place. Indeed, it is a DIY but it takes one's time and patience. I added extra long electrical leads for future use should it happen again. I would just abandon the faulty one in place and mount a new pump and filter outside the Onan box next time, hence the long leads.
Good fortune to you and thanks for all your sage advice and insight.
Steve