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Nikki carburetor clean and rebuild #4783288
06/10/18 06:54 PM
06/10/18 06:54 PM
Joined: Jun 2011
Posts: 1,866
Crawfordville FL
SilverFusion2010 Offline OP
SilverFusion2010  Offline OP

Joined: Jun 2011
Posts: 1,866
Crawfordville FL
42” Troy-bilt pony with 17.5 hp B&S Power Built. Has a Nikki carburetor. My brother-in-law’s mower, sat for a long time without being run.
When I pulled the fuel line off the carb something resembling mud came out. I pulled the carb off, dumped yellow gas out of the bowl. Sprayed everything out with carb cleaner, put it back on and she still wouldn’t run. It would run if I sprayed carb cleaner directly into the intake so I knew I had a fueling problem.

Took the bowl off again and it was dry, so I grabbed the big guns and shot some compressed air through the fuel inlet, popped the float valve off and sprayed the passages clean and ran air through all of them. Valve works because when I blow through it it will stop flow as I move the float.

I’m waiting for a new float valve gasket, old one has swelled and doesn’t fit. Gasket won’t be here until Tuesday, so what else should I check while I have it apart? I’ve replaced the air and fuel filters. The oil has been changed and I’ve got the battery on a tender while I’m waiting on the gasket. Oh and I have a new spark plug arriving tomorrow. Ngk iridium because they really do improve starting and my brother-in-law is not mechanically inclined and does no maintenance so best to have a “lifetime” plug installed.

I’ll be checking tire pressures, possibly shooting some grease into the steering gear. I don’t have the right kind of grease, the stuff I have is high moly wheel bearing grease. Valvoline I think.

Anyway, what else should I look over while I have the mower?


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783321
06/10/18 07:33 PM
06/10/18 07:33 PM
Joined: Jan 2003
Posts: 3,202
Coastal South Carolina
edwardh1 Offline
edwardh1  Offline

Joined: Jan 2003
Posts: 3,202
Coastal South Carolina
honda gen set bowl drain plug gasket was sold only as a $32 package. i went to a hardware store for a simple washer. glad u could get the gasket


These products are all new every year?? They are a revolution!!! Razor blades, mens shirts, TVs, wiper blades, gutter guards, hearing aids... according to the ads. But also all new last year
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783336
06/10/18 07:56 PM
06/10/18 07:56 PM
Joined: Jun 2011
Posts: 1,866
Crawfordville FL
SilverFusion2010 Offline OP
SilverFusion2010  Offline OP

Joined: Jun 2011
Posts: 1,866
Crawfordville FL
It was 7.88 on amazon


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783377
06/10/18 08:50 PM
06/10/18 08:50 PM
Joined: Dec 2016
Posts: 8,459
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,459
Waco, TX
The gasket will probably shrink back to normal by the time the other one arrives.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783470
06/10/18 10:40 PM
06/10/18 10:40 PM
Joined: Oct 2014
Posts: 13,753
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,753
Canyon County Idaho
mud looking stuff in the carb float bowl? Is there a gas filter?


2015 F150 2.7
2018 F350 6.2
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783485
06/10/18 11:21 PM
06/10/18 11:21 PM
Joined: Jun 2011
Posts: 1,866
Crawfordville FL
SilverFusion2010 Offline OP
SilverFusion2010  Offline OP

Joined: Jun 2011
Posts: 1,866
Crawfordville FL
Yes, there is a fuel filter. I just replaced it


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783495
06/10/18 11:54 PM
06/10/18 11:54 PM
Joined: Mar 2008
Posts: 6,168
South Florida
bubbatime Offline
bubbatime  Offline

Joined: Mar 2008
Posts: 6,168
South Florida
An ebay or Amazon carb can be found for $12-$30 some times, depending on model. Always look at the cost of a new carb before buying gaskets and attempting to clean it.


17 Chrysler Pacifica Edge Syn 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 SuperTech Syn 5W20
06 GMC Sierra SuperTech 10W30


Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783566
06/11/18 05:34 AM
06/11/18 05:34 AM
Joined: Jun 2011
Posts: 1,866
Crawfordville FL
SilverFusion2010 Offline OP
SilverFusion2010  Offline OP

Joined: Jun 2011
Posts: 1,866
Crawfordville FL
Last I checked 7.88 < 30


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783570
06/11/18 06:01 AM
06/11/18 06:01 AM
Joined: Jan 2018
Posts: 1,169
San Antonio, TX
das_peikko Offline
das_peikko  Offline

Joined: Jan 2018
Posts: 1,169
San Antonio, TX
Those tiny little ports can get covered over by corrosion. Shop mechanics will use tag wire to clean them out. If there's any welch plugs, the ports underneath the welch plugs may be covered over with corrosion. You can use tag wire to clean the ports out. New welch plugs will have to be installed.

Re: Nikki carburetor clean and rebuild [Re: SilverFusion2010] #4783600
06/11/18 07:26 AM
06/11/18 07:26 AM
Joined: Apr 2014
Posts: 1,469
South Central PA (Fulton Co)
Delta Offline
Delta  Offline

Joined: Apr 2014
Posts: 1,469
South Central PA (Fulton Co)
I have a Nikki carb on my Briggs 13.5HP, and more than likely it's the same model. Couple years ago it was $120 and the cheapest I've seen it now is around $75.


'17 VW GTI 2.0T - 6MT - 15K - PPE 5w40
'15 Camry SE - 2.5 - 23K - PP 0w20
'09 Tacoma TRD - 4.0 - 131K
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