'Surging' on Honda GCV 160 Lawnmower

ADW1March 25, 2012

Hello,

I live in France and bought the above Model two years ago. At the end of last season it started 'surging'. Took it to my local garage where it has been for three months and he hasn't been able to cure the problem, so hasn't charged me. I have researched this forum and realise I should have drained it of fuel, which I hadn't. I have checked the air filter which is clean. It will only stay running on full choke with lots of backfiring, but gives up after five minutes or so and stops.

The lawnmower is in very good condition and I am reluctant to just dump it. Any advice or suggestions etc with regard to what I could try to solve this problem would be most appreciated.

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tn_gardening

Might I ask what the shop has already tried to fix?

Sounds like a carb issue (you mentioned old fuel)

Might also be a weak governor spring.

    Bookmark   March 25, 2012 at 10:39AM
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ADW1

The garage, (local, well recommended, repairs all the local lawnmowers) cleaned and adjusted the carb, blew out jets. I think he had spent some time it even though he didn't charge me. We have put more fuel in the tank but didn't clean out the old because I hadn't heard about what happens to old fuel left standing until I read about it on this forum. Would it be worth draining down the fuel and then running some sort of flushing through it. I am not mechanically minded so don't know whether that is feasible or not.

    Bookmark   March 25, 2012 at 11:06AM
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tomplum

You could try replacing the fuel and get it up and running- then feeding bursts of spray carb cleaner down through the carb throat as it runs to help remedy a s sticky valve issue. Very common on these after they sit. On these there have been several that even look clean inside, but pull them apart and blow them out they don't perform right. New carbs are ridiculously inexpensive. So I would pick up a new carb, gaskets, remove the tank (via the three recoil bolts) clean it and flush the line and there ya go. If the tank is real dirty, don't be afraid to simply wash it well with water and let it dry. Otherwise, a few rinses w/ clean fuel is normally what it takes.

    Bookmark   March 25, 2012 at 1:16PM
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bill_kapaun

"Would it be worth draining down the fuel and then running some sort of flushing through it. I am not mechanically minded so don't know whether that is feasible or not."

I'd drain out the old fuel.
IF your carb has the bowl drain nut, open that too so everything drains.

Put in about 0.2-0.3 liter of fresh fuel.
Add a STRONG amount of carb cleaner to the fuel. About 10x the recommended amount for "normal" use.
Run the engine to use up the fuel. Hopefully it'll start to "improve" in a short time.
When the engine is running well, top off the fuel tank and run a few minutes to dilute the strong carb cleaning solution from the fuel lines etc.

Also make sure the fuel shot off valve id FULLY open.

    Bookmark   March 25, 2012 at 5:53PM
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ADW1

Thanks for the replies, all very helpful & interesting, how did we all manage to learn anything before the Internet !!

    Bookmark   March 26, 2012 at 1:40AM
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tn_gardening

I'd also clean out the muffler.

I've also heard of poor ventilation with the gas cap to cause similar things.

And there's the fuel filter, too.

    Bookmark   March 26, 2012 at 2:17PM
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keithtx(8)

FYI I had this problem w/a Briggs engine. Try this:
--
Scotts Riding Mower w/25HP Briggs Intek. Hard start and surging then just dies out. I have had issues with this for a long while. It normally went away when warmed up. Now I could not keep it running. It would run if I kept spraying in starting fluid. But then just stop abruptly. Did carb cleaner; same. I was reading up on governor issues, so I went out and spayed aerosol "dry" lubricant all over the gov. & linkages twice. It started and ran perfectly now. Seems like that was the issue. The gov. was not responding properly to keep it running. I have not used for a job yet, so I will see if that really cured it...

    Bookmark   March 27, 2012 at 12:45PM
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