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Steve K (IA)
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« on: September 13, 2015, 10:43:42 AM » |
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Snowblower (winter is coming), Troy-Bilt 179cc OHV.
The engine surges. Last winter I took the carburetor off and cleaned 3 times with no improvement.
I'm thinking since I got the bike back together I better get this sorted out before it gets cold.
I soaked the carb in a gallon bucket of Berryman's. Used compressed air in the circuits. Nothing stops the surging. Any ideas?
Harbor Freight has a 212cc OHV engine for $120. This may be my option if I don't get this figured out before the snow flies.
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old2soon
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« Reply #1 on: September 13, 2015, 11:42:38 AM » |
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I may be WAY off base here but is the governor spring controlled? Fuel pick up clean? Good clean air filter? Anybody else? RIDE SAFE.
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Today is the tommorow you worried about yesterday. If at first you don't succeed screw it-save it for nite check. 1964 1968 U S Navy. Two cruises off Nam.
VRCCDS0240 2012 GL1800 Gold Wing Motor Trike conversion
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Steve K (IA)
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« Reply #2 on: September 13, 2015, 12:44:49 PM » |
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I may be WAY off base here but is the governor spring controlled? Fuel pick up clean? Good clean air filter? Anybody else? RIDE SAFE.
Yes, yes and yes. Been checking out YouTube and seems to be a common problem. |
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98valk
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« Reply #3 on: September 13, 2015, 01:28:07 PM » |
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small engine surging is usually water in the fuel system and/or old gas.
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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3W-lonerider
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« Reply #4 on: September 13, 2015, 01:45:29 PM » |
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i had that problem with quite afew small engines till i started running non-ethenol gas in them. they run good now.
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indybobm
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« Reply #5 on: September 13, 2015, 02:03:34 PM » |
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Surging can also be caused by the governor doing its job. Is it running at a fast clip?
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So many roads, so little time
VRCC # 5258
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Steve K (IA)
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« Reply #6 on: September 13, 2015, 02:59:31 PM » |
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Surging can also be caused by the governor doing its job. Is it running at a fast clip?
WOT when blowing snow. Under a load it doesn't surge as much as when no load. Even surges at idle. I had tried new gas, Sea Foam.... Guess I'll take the carb off one more time and allow it to soak in the Chem Dip for a longer period. Say's on can no longer than 30 minutes. I'm thinking something is clogged so a much longer soak may have to happen. I've had push mowers that would start to surge. I would add an ounce of Sea Foam to the gas tank and a minute later it smoothed right out. |
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Pete
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« Reply #7 on: September 13, 2015, 03:18:21 PM » |
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Sounds like you may have a lean condition.
That causes the engine to almost stall and the governor cuts in to keep it running.
Run the engine and observe the governor if it is not stable under no load, richen the mixture with the carb screw.
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Steve K (IA)
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« Reply #8 on: September 13, 2015, 03:39:08 PM » |
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Sounds like you may have a lean condition.
That causes the engine to almost stall and the governor cuts in to keep it running.
Run the engine and observe the governor if it is not stable under no load, richen the mixture with the carb screw.
No adjustments at all. Otherwise that would of been the first thing I would have tried. I'm sure it is a Chinese engine. It's not a Briggs or Tecumseh. |
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Jess from VA
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« Reply #9 on: September 13, 2015, 04:13:43 PM » |
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Sometimes with small engines, you just need a new carb.
Carburetors are as mystifying to me as thermos bottles (they keep cold things cold, and hot things hot, but how do they know?)
I've fixed one or two (by accident), but mostly they explode into small parts and springs to never be found again.
Often, if you have your manual and look the part part number up on line, it's like $35 and then you wonder why you invested time and hair pulling with the old one (forehead smack). And if you don't have your manual, there's one on line anyway.
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Michvalk
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« Reply #10 on: September 14, 2015, 05:27:41 AM » |
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the shaft that the butterfly works on can wear, and suck air around it causing it to surge. I have an old rototiller that does the same thing. The only repair for that is a new carb.  |
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WintrSol
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« Reply #11 on: September 14, 2015, 07:44:49 AM » |
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Sounds like you may have a lean condition.
That causes the engine to almost stall and the governor cuts in to keep it running.
Run the engine and observe the governor if it is not stable under no load, richen the mixture with the carb screw.
No adjustments at all. Otherwise that would of been the first thing I would have tried. I'm sure it is a Chinese engine. It's not a Briggs or Tecumseh. There is one adjustment - the float level. If, during cleaning, you bent the tab, it could be over-filling or under-filling. Put in a fresh plug, and evaluate the mixture after running at WOT for a while; adjust the float as needed. Or, friction has built up in the mechanics of the governor, or the carb is leaking air and need replacing. |
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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