Got this pm this morning guys, any ideas??? White Magic Pro 1500 Good Morning Rob, I have a White Magic Pro 1500 completely re-furbished by a guy up in New Hampshire. I picked it up back in January and have done a number of residential jobs successfully. (still part-time) Last evening I completed a larger 6600 squ ft job at a local hotel. Everything went fine until we were almost finished. The last 200 or so squ ft was difficult as the machine started to bog down under heavy vacuum load. ( I think). Good vacuum, Good pressure, it almost seemed as though the governer was not accelerating the engine (24hp Onan) under the heavy load?? Got home at 5AM, got up at 7 to go to work at my full time job, so I have not had the time yet to look the machine over. I see you are quite familiar with the White Magic machines, thought you may be able to point me in a direction. ( I have not been able to reach my re-furb guy by phone for several weeks) Thanks, Jim
Have him check his vac relief valve and see if it is stuck closed and that it is adjusted properly. Inspect air cleaner. Remove spark plugs and clean them. Rob, you can pass my phone # to this guy and I would be happy to help if these suggesstions do not work. Chris @ 505.934.1527
Next time that happens try pulling your choke out slowly to see if the engine responds to richer delivery. Or maybe the choke was pulled out making it too rich.
Thanks for the info, last night I went home and crashed. I must be to old to be up all night. I plan to try to get into the machine this evening and check things out.
Hey Chris, Thanks for the info on my machine. Last night i went home and fell asleep right after dinner. I was pretty shot from the all nighter. I hope to look at the machine tonight. I appreciate the offer of the phone number for assistance. Jim
My experience with 24hp onans, after checking the usual plugs and air cleaner I would re torque the head gaskets and do a compression test. Could be a loose head gasket or burnt or carboned up valve not seating properly.
How did you get on with the final 200’ Did the machine start straight back up again Has it stalled like this in the past Defiantly engine problem What kind of engine is it
Sorry Guys, I had to go out of town on some business for my full time job. To answer a couple of the questions, I had to nurse the machine for the last few minutes by messing with the choke. Just this weekend, I did a small two room job and the machine started bogging down again after 20 minutes. Air cleaner is clean, Plugs look ok, it seems like the Carb or the governor is not working correctly. Thanks for any help. Jim PS, Chris, i will probably call you this evening.
You must not like me or you would have thanked me for suggesting to pull your choke. Best to richen before more detonation occurs.
Truck Mount Bogging Down Ara, Sorry, i meant no disrespect. Thank you and everyone else for the ideas that were sugested. I not very good at this forum thing yet. I did have to mess with the choke to get through the end of the job. It would help for a couple of seconds, but soon after go back to not running right. A buddy of mine has worked for a lawn and garden dealer for years and has agreed to take a look at it for me. He seems to think i may have a clogged fuel filter somewhere, or possibly the vent on the top of my fuel cell may not be working correctly. I have some big plans this weekend to get into the unit and get it fixed. Once again, sorry for the inproper lack of response, and thank you for your help. Jim
No worries. Fact is, underneath the tough guy facade I am a real sensitive, emotional guy. I like to brawl or give a box of chocolates. Take your pick. I hope things work out with your truckmount! Sincerely
If its something so simple as a fuel filter then most filters are transparent and you shuold be able to see any muck in it
I though you wear being a bit funny with me soon after I had joined But I did not rely discover the thanks button and what it did untill later on
Truck Mount Bogging Down Thanks to everyone for the help and support. Everything is back to normal and working great. The Onan has an onboard fuel pump and an additional electric fuel pump running between the fuel cell and the motor itself. In my haste somwhere around 4AM during my overnight job, I pulled the fuel cell out of the van to re-fuel without shutting down. (I didn't want to refuel next to the hot machine) The ground wire for the electric fuel pump is kind of short and was pulled out of the harness. I guess the onboard fuel pump was enough to keep things running ok for a while, but soon the motor was starving for fuel and bogging down. Reconnected the fuel pump wires, and did a 4 room job this weekend, everything worked great. It the simple stuff that will drive you nuts!!! Once again, thanks for all the imput. It lead me in the right direction to eventually find the problem. You guys are Great!!!
Well I’m so pleased to hear you have sorted it all out at last Just a couple of questions 1. why have you got 2 fuel pumps, one should be sufficient 2. Why are you filling you fuel tank up inside the van the fuel tank should be (for safety reasons and efficacy) mounted to the chasse of your van parallel to your van fuel tank P.S. Dose your electronic fuel pump not make a ticking noise when on The silence from the fuel pump with the ignition on should have been imminent from the moment you turned the key
Truck Mount No longer Bogging down The Fuel cell is a 5 gallon portable tank inside the van. I fill the tank each day at the local service station. The evening I had difficulty, I was in place cleaning the commecial job, and I needed to refuel. I removed the portable tank from the van still (fuel line was long enough) and refueled. The problem as stated was that the ground wire for the fuel pump was not long enough. I am unsure as to why I have two fuel pumps. Thats how it was set up when I purchased the machine. It would make sense that due to the length of fuel line, along with the elevation of the fuel tank relative to the carberator, it requires the assistance of the electric fuel pump. I have some hearing challenges and did not notice the absence of clicking noise. I should have, but I did not.
Ar so your electrical fuel pump is mounted to your fuel tank I’m curios about your other pump though Is it a gravity feed pulse pump that has 3 fitting on; one for fuel in one for fuel out and the other is air Or is it actually powered by the engine
