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#4541461 - 10/12/17 06:55 PM Lawn mower main jet plugging up...
ZZman Offline


Registered: 03/17/08
Posts: 4400
Loc: Michigan
Finally got fed up taking lawn mower main jet out and cleaning it so mower would run. Bought a filter at O'Reilly Auto Parts today and installed it. Hope no more issues!
Do you guys usually run fuel filters on small engines?


Edited by ZZman (10/12/17 06:55 PM)
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#4541467 - 10/12/17 06:59 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
4WD Online   shocked


Registered: 09/21/10
Posts: 4204
Loc: Texas/International
No, but about to start … my B&S (7) was just rescued by CRC throttle body cleaner approved
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#4541475 - 10/12/17 07:09 PM Re: Lawn mower main jet plugging up... [Re: 4WD]
ZZman Offline


Registered: 03/17/08
Posts: 4400
Loc: Michigan
Originally Posted By: 4WD
No, but about to start … my B&S (7) was just rescued by CRC throttle body cleaner approved


Usually some carb cleaner worked. This last time I needed to use a small pin pushed into the jet hole to clear whatever was in it.
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#4541489 - 10/12/17 07:16 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
4WD Online   shocked


Registered: 09/21/10
Posts: 4204
Loc: Texas/International
Was out of carb cleaner when I grabbed the CRC … found it a better blast than the cheap cleaners I normally buy …
started second pull …
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#4541494 - 10/12/17 07:19 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
Chris142 Offline


Registered: 06/05/03
Posts: 15671
Loc: apple valley, ca
I always add a filter. The one in the tank may not work well enough.
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#4541535 - 10/12/17 08:03 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
Blkstanger Offline


Registered: 08/13/11
Posts: 1718
Loc: Lakeside, CA
Mine would always do that. I started treating the fuel and all my problems went away.
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#4541566 - 10/12/17 08:32 PM Re: Lawn mower main jet plugging up... [Re: Blkstanger]
4WD Online   shocked


Registered: 09/21/10
Posts: 4204
Loc: Texas/International
Putting so much additive in gas cans that additives might need filtering …
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#4541710 - 10/12/17 10:42 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 16581
Loc: Clovis, CA
Let me know how you add a filter to a tank mounted carburetor. I'm all ears. grin2

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#4541712 - 10/12/17 10:46 PM Re: Lawn mower main jet plugging up... [Re: ZZman]
Kestas Online   content



Registered: 06/04/02
Posts: 11877
Loc: The Motor City
With any carburetor problems I take the whole fuel system apart and clean it, including the fuel tank. Then I try to not introduce any more contaminants. Some of my OPEs have a fine mesh filter at the fuel tank.

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#4541879 - 10/13/17 07:15 AM Re: Lawn mower main jet plugging up... [Re: Chris142]
edwardh1 Offline


Registered: 01/17/03
Posts: 2694
Loc: Coastal South Carolina
yes, briggs has two colors, red filter is for engines without a fuel pump I think
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#4541935 - 10/13/17 08:12 AM Re: Lawn mower main jet plugging up... [Re: ZZman]
EdwardC Online   content


Registered: 11/14/13
Posts: 1512
Loc: Chicago, IL
I like to add a clear filter whenever possible. Usually for older machines, I swap out the lines for transparent Tygon stuff, it's also convenient to be able to see fuel flowing. I put them on all my bikes too!

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#4541948 - 10/13/17 08:20 AM Re: Lawn mower main jet plugging up... [Re: ZZman]
Bgallagher Offline


Registered: 04/17/12
Posts: 3097
Loc: Boston, MA
Throttle body cleaner and a good winterize would solve that issue.
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#4541966 - 10/13/17 08:36 AM Re: Lawn mower main jet plugging up... [Re: ZZman]
jeepman3071 Offline


Registered: 04/15/10
Posts: 3475
Loc: Storrs, Connecticut
I run filters on all of them, mainly because I'm surprised at the amount of junk that seems to come out of gas pumps and into the cans.

With that said, 90% of the carburetors I have to clean for customer small engines are gummed up due to varnish and bad fuel. Something that can't be solved with a fuel filter.
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#4541972 - 10/13/17 08:51 AM Re: Lawn mower main jet plugging up... [Re: jeepman3071]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 18570
Loc: Sunny Florida
Originally Posted By: jeepman3071
I run filters on all of them, mainly because I'm surprised at the amount of junk that seems to come out of gas pumps and into the cans.

With that said, 90% of the carburetors I have to clean for customer small engines are gummed up due to varnish and bad fuel. Something that can't be solved with a fuel filter.


Yessir. Just had to pull the carb on my 10 year old trash pump. Always fed E10 with stabil in it. Not real sludgy, but the freaking microscopic main jet was plugged.
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#4542025 - 10/13/17 10:05 AM Re: Lawn mower main jet plugging up... [Re: EdwardC]
4WD Online   shocked


Registered: 09/21/10
Posts: 4204
Loc: Texas/International
I ordered an assortment of that hose and will give it a try … sad how many times I have trouble with an engine over poor quality fuel hoses …
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