Recent Topics
Speed & Temperature ratings vs cold PSI
by badtlc
17 minutes 3 seconds ago
Worthy of a news story??
by andrewg
56 minutes 12 seconds ago
Gorilla Shooting...decaying moral values?
by Smokescreen
Today at 09:53 AM
Oil Change Frequency - 04 Neon
by racer12306
Today at 09:15 AM
Great PDF on Mazda Skyactiv
by buster
Today at 08:43 AM
2014 Chevy Silverado 1500 CC. 5.3L 4WD Oil
by AirgunSavant
Today at 08:13 AM
0W-40 for 223k mile 95 Mercedes E320?
by gregoron
Today at 06:22 AM
I hate surprises
by Excel
Today at 06:10 AM
Wix coolant filter change and cut open
by A310
Today at 03:45 AM
O2 Sensor Voltage
by Falcon_LS
Today at 01:36 AM
Electrical shock at the grocery store
by Merkava_4
Yesterday at 11:42 PM
Another should I change my oil thread
by dan_erickson
Yesterday at 10:53 PM
Newest Members
ph9, Kurt34556, Skullzaflare, Jakes_Lawn, Aarrghhh
58031 Registered Users
Who's Online
89 registered (87sammy, aquariuscsm, 757guy, Abakev, 901Memphis, Andrei, 6 invisible), 1823 Guests and 142 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58031 Members
66 Forums
249626 Topics
4087061 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 1 of 3 1 2 3 >
Topic Options
#2046029 - 10/13/10 09:17 PM How to fix snowblower surging
Nick R Offline


Registered: 07/14/09
Posts: 10987
Loc: Albany, NY
I've posted about this before, the last time I think was last winter. We have a 2008 M/Y Craftsman 26" with a Chonda 208CC OHV engine. The engine has great power, and runs pretty smooth overall. The one problem I have with it is that at high throttle, it surges very badly, especially under load. I honestly don't know what to do about it. I've run Techron through it, it has a new spark plug... Do any of you have any suggestions on how to fix this? Adjust the mixture or something maybe?
_________________________
2013 Ford Focus SE 2.0L/70,000miles/Motorcraft Blend 5W-20/FL-910S

Top
#2046039 - 10/13/10 09:26 PM Re: How to fix snowblower surging [Re: Nick R]
tom slick Offline


Registered: 05/26/03
Posts: 8966
Loc: Central Coast, Calif.
look for vacuum leaks.
_________________________
You get what you pay for...
So keep in mind how much you paid for this advice.

Top
#2046040 - 10/13/10 09:26 PM Re: How to fix snowblower surging [Re: Nick R]
cchase Offline


Registered: 11/03/09
Posts: 4018
Loc: New England
Governor?

Top
#2046042 - 10/13/10 09:28 PM Re: How to fix snowblower surging [Re: Nick R]
Nick R Offline


Registered: 07/14/09
Posts: 10987
Loc: Albany, NY
Could a governer not work properly in such a way that it would cause this? vacuum leaks? Could that cause surging?
_________________________
2013 Ford Focus SE 2.0L/70,000miles/Motorcraft Blend 5W-20/FL-910S

Top
#2046043 - 10/13/10 09:28 PM Re: How to fix snowblower surging [Re: Nick R]
expat Offline


Registered: 05/12/09
Posts: 5072
Loc: Canada
If you can adjust the mixture, I'd guess it's running a little lean.

Top
#2046053 - 10/13/10 09:34 PM Re: How to fix snowblower surging [Re: expat]
CourierDriver Offline


Registered: 12/27/09
Posts: 3974
Loc: USA
I would vote for the fuel mixture adjustment also. I had this problem on a portable generator.
turn the adjustment screw clockwise, if this starts to shut down the engine, turn it ccw till the surging stops. I also poured in 2 oz of stabil fuel stabilizer should there be any water in the tank. Ethanol attracks water. I got rid of the surging with the adjustment screw setting .
_________________________
Maxlife 5w30 2005 LaSabre,125kmi
F150,2010, wifes ride,5w20 Mlife,40kmi

Top
#2046079 - 10/13/10 10:06 PM Re: How to fix snowblower surging [Re: Nick R]
JTK Offline


Registered: 08/14/03
Posts: 8595
Loc: Buffalo, NY
Nick, I vaguely recall your issue with this last winter. Did you change out to a quality spark plug? These engines can be set to run lean right from the factory, which is what this sounds like. Does it have a choke? Does it settle out if you choke it a bit? The carb probably doens't have much if any adjustability, but if it did, I'd try to give it a tweak. Could be crud in the carb jetting as well. I've seen that on brand-new stuff.

Joel


Edited by JTK (10/13/10 10:07 PM)
_________________________
2016 Subaru Forester 2.5, CVT. 2013 Dodge Grand Caravan SE (Babe magnet III)

Top
#2046083 - 10/13/10 10:09 PM Re: How to fix snowblower surging [Re: Nick R]
Nick R Offline


Registered: 07/14/09
Posts: 10987
Loc: Albany, NY
Yeah I replaced it with an NGK plug, I posted a thread about it a week or two ago. And yes, it does smooth out if I turn the choke on a little bit.
_________________________
2013 Ford Focus SE 2.0L/70,000miles/Motorcraft Blend 5W-20/FL-910S

Top
#2046105 - 10/13/10 10:28 PM Re: How to fix snowblower surging [Re: Nick R]
JTK Offline


Registered: 08/14/03
Posts: 8595
Loc: Buffalo, NY
Worst case, I wonder if you could swap the carb out for a generic 6.5hp carb. They can be had for under $30.

http://cgi.ebay.com/HONDA-CARBURETOR-GX2...=item41535507b6

Joel
_________________________
2016 Subaru Forester 2.5, CVT. 2013 Dodge Grand Caravan SE (Babe magnet III)

Top
#2046113 - 10/13/10 10:40 PM Re: How to fix snowblower surging [Re: Nick R]
Nick R Offline


Registered: 07/14/09
Posts: 10987
Loc: Albany, NY
Wow that honda carb looks identical to the one that is on the snowblower... Chinese honda clone no lie. Though I would wonder if a 6.5HP carb would be big enough for this engine, which I would think is more than that.


Edited by Nick R (10/13/10 10:41 PM)
_________________________
2013 Ford Focus SE 2.0L/70,000miles/Motorcraft Blend 5W-20/FL-910S

Top
#2046119 - 10/13/10 10:44 PM Re: How to fix snowblower surging [Re: Nick R]
tom slick Offline


Registered: 05/26/03
Posts: 8966
Loc: Central Coast, Calif.
Did it ever run good at high speed?

My 6.5hp Honda had a bad surging problem that was caused by a cracked intake gasket.

Lean causes the surging because as the engine accelerates to top speed the carb's main (high speed) circuit mix goes lean. Unable to sustain full speed because of the lean mix, the rpm drop down until the mix gets rich again from the idle (slow speed) circuit. because the rpm has dropped the governor pulls the throttle wide open and it's then able to accelerate again, due to a better mixture, until it gets to high speed and the cycle starts over.

If it has an automatic choke it also plays into the cycle of lean/rich surging.
_________________________
You get what you pay for...
So keep in mind how much you paid for this advice.

Top
#2046122 - 10/13/10 10:46 PM Re: How to fix snowblower surging [Re: Nick R]
Nick R Offline


Registered: 07/14/09
Posts: 10987
Loc: Albany, NY
Well, since it is a honda engine, made in china... I'll look into that, maybe that is the problem. And no, it's done this from the first time we used it.
_________________________
2013 Ford Focus SE 2.0L/70,000miles/Motorcraft Blend 5W-20/FL-910S

Top
#2046150 - 10/13/10 11:18 PM Re: How to fix snowblower surging [Re: Nick R]
expat Offline


Registered: 05/12/09
Posts: 5072
Loc: Canada
Before you buy a new carb, remove the nut on the bottom of the float bowl and clean the main jet (it's proberbly the nut itself)

Top
#2046247 - 10/14/10 04:46 AM Re: How to fix snowblower surging [Re: expat]
hemitom Offline


Registered: 03/12/07
Posts: 778
Loc: canada
From reading your posts sounds like high speed adjustment is needed, most snowblower carbs come with adjustment screws to adjust the blower under load.
_________________________
2006 kia spectra
2006 chrysler 300 (gone to mopar heaven)
2009 hyundai santa fe
2004 mustang GT.

Top
#2046290 - 10/14/10 07:01 AM Re: How to fix snowblower surging [Re: Nick R]
Craig in Canada Offline


Registered: 04/06/06
Posts: 1995
Loc: Toronto-ish, Canada
Has the carb ever been removed and disassembled for cleaning? If the jets or fine passages are occluded with crud it can easily lead to surging. Running Techron isn't necessarily enough to rule cleanliness out as the problem.

Top
Page 1 of 3 1 2 3 >