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#4497293 - 08/24/17 08:16 PM Is there a good fuel additive for lawnmowers?
edweather Offline


Registered: 09/12/07
Posts: 59
Loc: Georgia
We inherited a small lawnmower with the house we bought. It's a 21" self propelled walk behind Troy Bilt, not very old, maybe 5 years. I have changed the air filter, oil, and checked the plug. Was running well, but has been a bit sluggish lately, and even konked out a couple of times, but it restarted. Is there anything else I should check? It just seems like a fuel system issue. Am running fresh 87 octane, but it has ethanol in it I'm sure. Will non ethanol gas help? Is there a fuel filter on it? Any suggestions are appreciated. Thanks, Ed
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#4497297 - 08/24/17 08:21 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
vwmaniaman Offline


Registered: 04/18/13
Posts: 129
Loc: Kevil,Ky
Put a quarter cup of seafoam in there next fill up.
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#4497304 - 08/24/17 08:24 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
I'd mix in a tiny amount of Techron fuel system cleaner on each fill up. Supposedly ethanol fuels are tough on some of the plastic parts in the fuel system. My dealer suggested running Startron additive. I ran out of that and just started using Techron and a few drops of MMO each fill up. Keeping the carb clean is they key to happy running. Non-ethanol fuel would be a help, but expensive. My local dealers wanted $30/gallon. Forget that.
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#4497305 - 08/24/17 08:25 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
oilpsi2high Offline


Registered: 12/18/14
Posts: 1318
Loc: NY, USA, etc.
Run a quarter tank of Techron with your next fill up.

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#4497306 - 08/24/17 08:25 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
zfasts03 Offline


Registered: 07/21/08
Posts: 251
Loc: Bucks, PA
Star Tron
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#4497325 - 08/24/17 08:49 PM Re: Is there a good fuel additive for lawnmowers? [Re: vwmaniaman]
JHZR2 Offline



Registered: 12/14/02
Posts: 41768
Loc: New Jersey
Originally Posted By: vwmaniaman
Put a quarter cup of seafoam in there next fill up.


+1. A tank or two before I change the oil, I run a dose of B12 or Seafoam, which seems to keep things nice and clean.

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#4497326 - 08/24/17 08:49 PM Re: Is there a good fuel additive for lawnmowers? [Re: zfasts03]
Slick17601 Offline


Registered: 12/04/04
Posts: 1515
Loc: Pennsylvania
Originally Posted By: zfasts03
Star Tron


+1

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#4497327 - 08/24/17 08:52 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
JustinH Offline


Registered: 04/17/04
Posts: 5174
Loc: Texas
I buy a cheap bottle of Supertech Fuel Injection/Carb cleaner in the automotive aisle at walmart.

Every time I put gas in my self propelled Deere, I put about a cap full of the stuff into the tank.

Since I started doing that the engine does not sputter at all, and starts on the second pull every time.

I think the supertech cleaner is $2.50 for the white bottle. At the rate I'm using it, it will last a year, and we mow nearly year round
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#4497330 - 08/24/17 08:54 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
MRtv Offline


Registered: 01/04/16
Posts: 207
Loc: Ada county Idaho
Plugs are cheap. Replace it. Just my opinion.

I buy a 5 gallon can of non-ethanol fuel in the spring. Lucky me Boise has it available. Usually I buy 91 octane. I add 2 oz of MMO. I use it all season long. If I have any left over it goes into one of my vehicles. I think I will add a dash of some Techron to the next tank fill in my mower.
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#4497332 - 08/24/17 09:00 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
Donald Offline


Registered: 03/21/04
Posts: 20450
Loc: Upstate NY
I use E0 gas and blue StaBil. All year long for all OPE.

You should pull the carb and clean it, install a carb rebuild kit if possible.
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#4497333 - 08/24/17 09:01 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
andyd Online   content


Registered: 09/25/04
Posts: 7138
Loc: Marshfield , MA
I run a cap full of MMO in every tank. That's so I don't have use a dose of Berryman's B 12 Chem Tool. B 12 will clean out a carb often enough so that I try it before I take the carb apart. Sea Foam is too expensive.
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#4497337 - 08/24/17 09:05 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
shurguywutt Offline


Registered: 06/06/17
Posts: 109
Loc: FL, USA
Non-ethanol 90 octane rec fuel is the only thing I use in my small carb engines. Change the plug and run some fresh rec fuel through it, put the 87 octane you have left in your car where it gets used much faster.
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#4497340 - 08/24/17 09:09 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7475
Loc: S California
Maybe a small fuel filter between the tank and the carb. And clean out the fuel tank and whatever additive you choose run some carb cleaner through the engine where the air filter goes. Change/clean the air filter often. Sharpen and balance the blade, too.

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#4497341 - 08/24/17 09:10 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
tig1 Offline


Registered: 01/03/09
Posts: 13657
Loc: Illinois
I use MMO in mine. Seems to work well.
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#4497350 - 08/24/17 09:25 PM Re: Is there a good fuel additive for lawnmowers? [Re: edweather]
Panzerman Offline


Registered: 12/16/06
Posts: 4203
Loc: Port Orange, Florida
It's usually the carb jet. The one in the bottom of the bowl.
Only once have I ever seen a spark plug cause problems. Most 4 stroke lawns begin and die with the same plug. The carb needs a good cleaning. The wire used in bread ties with the paper stripped off works well.
After you clean it good, treat the gas with Sea Foam or Star Tron and you will probably never have issues again.


Edited by Panzerman (08/24/17 09:26 PM)
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