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Re: Carburetor help
[Re: Kre]
#6219668
04/17/18 08:44 AM
04/17/18 08:44 AM
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Joined: Jan 2014
Posts: 1,986
Shenandoah County, VA
l1ranger
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Posts: 1,986
Shenandoah County, VA
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if you can get the main jet out without taking the whole carb off, its worth a try. as noted, count your turns and put back the same.
a new air filter is easy and cheap also.
might as well check the float while you are in there - may need a manual to tell you where it should be.
can probably find a specification for how much the fuel pump should be pushing out as well and check it.
Josh
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Re: Carburetor help
[Re: l1ranger]
#6219674
04/17/18 08:49 AM
04/17/18 08:49 AM
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Joined: Nov 2010
Posts: 1,424
USA-WI
Kre
OP
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OP
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Posts: 1,424
USA-WI
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if you can get the main jet out without taking the whole carb off, its worth a try. as noted, count your turns and put back the same.
So, do I tighten this all the way when I'm counting the turns? Then when I put it back in, tighten it completely and back it off the appropriate # of turns?
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Re: Carburetor help
[Re: Kre]
#6219723
04/17/18 09:40 AM
04/17/18 09:40 AM
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Joined: Jan 2014
Posts: 17,740
Central Oregon
AntiGov
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Posts: 17,740
Central Oregon
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if you can get the main jet out without taking the whole carb off, its worth a try. as noted, count your turns and put back the same.
So, do I tighten this all the way when I'm counting the turns? Then when I put it back in, tighten it completely and back it off the appropriate # of turns? The main jets I have changed are not adjustable by number of turns . Just tighten all the way.
Report a post club - Non member
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Re: Carburetor help
[Re: BBarnes]
#6219950
04/17/18 03:07 PM
04/17/18 03:07 PM
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Joined: Nov 2010
Posts: 1,424
USA-WI
Kre
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OP
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USA-WI
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If it's running fine at idle and up to half throttle as you say it's not the carb. You need to rebuild your fuel pump. It has a diaphragm in it and springs. The springs are sticking or the diaphragm has a pin hole in it.
Seen it many times. Most carbs in todays world have no adjustment, they are a one shot wonder eco friendly JUNK. IE replace only. What you describe is the fuel pump. It's not getting enough fuel at full throttle.
B Keep in mind this an Onan engine. This isn't something that's new. I believe it was built in the 80's. But, I hope you're right about the fuel pump, because that would be the easiest fix...and cheap.
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Re: Carburetor help
[Re: hippie]
#6220000
04/17/18 04:09 PM
04/17/18 04:09 PM
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Joined: Nov 2010
Posts: 1,424
USA-WI
Kre
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OP
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All the mechanics here will laugh, and i'm one, but having raced for years on dirt where carbs will get some crap in them, try this.
Rev the engine and them block the intake with your hand. The added vaccume from blocking the air off will pull the junk thru if that's what your problem is.
Ya wouldn't believe how many times this has worked. I will give it a try! Thanks for the tip!
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Re: Carburetor help
[Re: Kre]
#6220145
04/17/18 07:35 PM
04/17/18 07:35 PM
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Oh Snap
Unregistered
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Oh Snap
Unregistered
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Make sure the governor is working freely.
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Re: Carburetor help
[Re: hippie]
#6220309
04/17/18 10:33 PM
04/17/18 10:33 PM
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Joined: Apr 2013
Posts: 1,759
east TN, USA
harleydparts
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Posts: 1,759
east TN, USA
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All the mechanics here will laugh, and i'm one, but having raced for years on dirt where carbs will get some crap in them, try this.
Rev the engine and them block the intake with your hand. The added vaccume from blocking the air off will pull the junk thru if that's what your problem is.
Ya wouldn't believe how many times this has worked. You've squirted water in a carb a time or two ain't ya?
Not as bad as I could be, not as good as I should be.
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Re: Carburetor help
[Re: hippie]
#6220523
04/18/18 09:11 AM
04/18/18 09:11 AM
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Joined: May 2016
Posts: 1,306
Maine
Jonnytrapper
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trapper
Joined: May 2016
Posts: 1,306
Maine
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All the mechanics here will laugh, and i'm one, but having raced for years on dirt where carbs will get some crap in them, try this.
Rev the engine and them block the intake with your hand. The added vaccume from blocking the air off will pull the junk thru if that's what your problem is.
Ya wouldn't believe how many times this has worked. I wouldn't laugh. I do that all the time. Works often enough to keep me trying. I usually put a rag around my hand.
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