Don't know that this will help you but many Honda walk behind mowers have the same problem if they have a blade clutch on them. With the blades not engaged they will set there and surge constantly. Then when you engage the blades it will smooth out and run great. The reasoning is that when you put a load on the engine it will pull more fuel into the engine so therefore it smooths out. Usually you can clean the pilot jet on the carb and correct this problem. The pilot jet is so small it doesn't take but a spec of foreign material to plug it partially up and cause this problem. I hope P&K hit the nail on the head and fixed your problem. I live in MWC so not that far from you. Good luck.
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Export threadtheoldwizard1
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TRUE ! Almost all surging problems are cause by the pilot jet.Usually you can clean the pilot jet on the carb and correct this problem. The pilot jet is so small it doesn't take but a spec of foreign material to plug it partially up and cause this problem.
Depending on the size of the engine, you may or may NOT be able to clean it with one of the fine wires in a carburetor jet cleaner kit. If not, you need a set of #60 - #80 drill bits and a pin vice. Start small. like a #78 or #76.
I had to use a #76 on a genuine Honda GX160 just last week !
Most fuel problems will vanish if you use a fuel conditioner added when you fill a new can. I do this all year long with a marine grade conditioner. A few penny's at this point will lesson the amount of aspirin needed.I have a new Z325E Zero turn JD mower. Bought 2 months ago. 30 hours on it. Mowing today and when I disengaged the mower blades it started surging, like moving the throttle up and down. When a load is put on it, like mowing it does not surge. I cleaned my 5 gallon gas can, went to a different gas station frilled it up, came back, disconnected fuel line from mower gas tank, installed new gas filter, put gas line into gas can a couple inches below gas level, started the mower ran it 10 minutes and it still surged. It is under warranty, so I called the dealer that would be working on it. First thing they said was bad gas. I filled up 3- 5 gallon cans 2 weeks ago and used one can and no problem till today.
That load compensation only occurs because the governor opens the throttle plate increasing intake airflow which lowers the pressure and the atmosphere pushes more fuel thru the orifice.Don't know that this will help you but many Honda walk behind mowers have the same problem if they have a blade clutch on them. With the blades not engaged they will set there and surge constantly. Then when you engage the blades it will smooth out and run great. The reasoning is that when you put a load on the engine it will pull more fuel into the engine so therefore it smooths out. Usually you can clean the pilot jet on the carb and correct this problem. The pilot jet is so small it doesn't take but a spec of foreign material to plug it partially up and cause this problem. I hope P&K hit the nail on the head and fixed your problem. I live in MWC so not that far from you. Good luck.
The Specialist
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Hi. I read your problem of the surge, but with all the chatter, I don’t know if you have fixed it. When you stated that you could hear popping coming through the exhaust, your problem is that you don’t have enough clearance on your intake valve. The intake valve is staying slightly open and the fuel/air mixture is going back and fourth in the pipe between the cylinder and carb. This is common with new engines and it needs a simple adjustment. I’m guessing that you have a briggs engine. If you need instructions-reply. I’m one of the top technicians in Canada and the United Kingdom.That load compensation only occurs because the governor opens the throttle plate increasing intake airflow which lowers the pressure and the atmosphere pushes more fuel thru the orifice.
I have never used ethanol in anything. When I took it into JD it was surging and had a low volume very faint popping sound. I just mowed 2 acres of my 5 and no surging at all, but the very low volume popping has come back. Monday I will take it back to JD, unless it is a simple fix and someone can tell me how to do it, as I don't want to void the warranty. 200 hundred hours or 3 years.
Yes B&S 24hp. Instructions would be great. Thank you.Hi. I read your problem of the surge, but with all the chatter, I don’t know if you have fixed it. When you stated that you could hear popping coming through the exhaust, your problem is that you don’t have enough clearance on your intake valve. The intake valve is staying slightly open and the fuel/air mixture is going back and fourth in the pipe between the cylinder and carb. This is common with new engines and it needs a simple adjustment. I’m guessing that you have a briggs engine. If you need instructions-reply. I’m one of the top technicians in Canada and the United Kingdom.
The Specialist
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Yes B&S 24hp. Instructions would be great. Thank you.