Question about Honda 25cc 4-cycle Mini Tiller

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I have honda fg 110 a mini tiller it starts fine runs for about 10 min then quits. choke it it starts fine then same thing.

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  • Jeff H.
    Jeff H. May 18, 2014

    Mine had identical symptoms. There is a little one way valve in the fuel cap that is visible and fixable when you pull the inside of the cap out. The little lips on mine were never opened. I parted them with a little screwdriver. Runs full tilt for ever now.

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I have a similar problem.
The first time it was cause by the ethanol in the gasoline. It deteriorated the carberater rubber membrane so that it had a crack in it. The carberater would run lean. Take off the primer bulb and there is a plastic cover that goes over the rubber membrane. Remove that cover, and check the membrane. If this has a crack, you can order another from a honda dealer. It is about 14 dollars. After that just use ethanol free gas. Search the internet for a local source.

The second problem I had developed a little later. The engine would start, but if I gave it full throttle, it would quit. It got worse and worse till it would run at all. I noticed when I loosened the Gas cap, then the engine would run. And when I loosed the cap, I heard a whoosh, like air being sucked in.
So I figured the cap wasn't breathing like it should, which cause a suction in the gas tank. So I took a diaper pin and went through the holes on the inside of the cap, and through the little rubber plug in the center of the inside of the cap, several times. This allowed the cap to breath. Now it runs great.

Posted on Sep 11, 2011

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I have a new FG110 tiller. I can't get it to start. Has oil, has gas, clutch off, switch on. I pull the cord over and over and nothing. Any suggestions

Posted on Apr 04, 2011

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I think even the small mantis tillers have low oil shut offs so that's always the first thing to check if you haven't already. You'll need to clean the carb off, if you remove the air filter cover and the corresponding screws underneath you'll gain access to the carb. If you don't feel comfortable dismantling it completely you can shoot the carb and choke cleaner while working the choke back and forth. Give it time to dry completely, this should not take long as it is designed to clean and dissolve rather quickly. Once you're sure there is no blockages turn the unit on and listen to it's idle, if the unit sounds as if it is reving too low than turn the idle adjustment (a black plastic screw on the carb) counter-clockwise taking care not to go too high as this could damage the engine. Adjusting the gas/air mixture shouldn't need to be done so stay away from these adjustments for the time being.

Posted on Apr 16, 2010

  • Michael DiScala Apr 07, 2012

    I have the same tiller and it does the same thing. I find if I unscrew the gas cap and replace it it stops. I think it develops some sort of vapor lock

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MANTIS TILLERS USE THE SAME ATTACHMENT CALL THEM @1 (215)355-9700

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2 Answers

Fg 110 mini tiller by honda


I have had the same problem.
The first time the solution was to replace the rubber membrane underneath the primer bulb. Take off the bulb, then remove the plastic part underneath the bulb. There is a rubber membrane underneath that. The ethanol in the gasoline tends to deteriorate the membrane. The honda dealers sell them for about 14 dollars.

The second time the problem was caused by the gas cap, not properly venting. In this case the engine would start and run, but when I gave it full throttle, it would quit.
It got so bad that it wouldn't even run. I noticed when I loosened the gas cap it ran great.
So I took off the cap, removed the inner parts, and got a diaper in and pushed it though the holes in the plastic part underneath the cap, and through the rubber plug in the center. I did this a few times and check with my mouth to see if I could pull some air through the cap. When it breathed satisfactorily, I put the cap back on the gas tank and it ran great. Now it runs better than new.

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