HP470 Mountfield Lawnmover (Bridge & Stratton Engine)- Hunting - please help?


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Old 04-20-15, 05:50 AM
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Unhappy HP470 Mountfield Lawnmover (Bridge & Stratton Engine)- Hunting - please help?

Hi All,

Thanks for taking the time to read this.
I bought a HP470 Mountfield a few years ago and use every summer.

I noticed last year it was hunting and smoking, I changed the Diaghram and worked much smoother, this was about 6 months ago.

I wanted to cut the grass and this time would not start, so I changed:

1. Mountfield 4 stroke oil changed
2. Air Filter changed
3. New diaphram kit installed

"....Now it runs but still lumpy hunting rather than running with enough revs to cut grass.."

I have read the posts had simlair issue. Although am I missing something. Any assistance would be appreciated?

Regards T
 
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Old 04-20-15, 06:24 AM
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Clean the carburetor. It sounds like it's got a jet or passage that's clogged. It's a particularly common problem after any machine has sat unused for a period of time.
 
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Old 04-20-15, 10:54 AM
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With the smoking it was doing, there is a good chance the spark plug is fouled. Might want to change it.
 
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Old 04-21-15, 05:56 AM
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Thumbs up Update

Thanks chaps...

1. Forgot to mention I have replaced with a new spark plug (cheese)
2. Carburetor thanks will try and locate this...(Pilot Dan)

Keep you posted..
 
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Old 04-21-15, 06:47 AM
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Unhappy update 2

Sorry this was me being mindless, I checked the Carb and its clean as a whistle...

Is there anything I could do?
 
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Old 04-21-15, 07:02 AM
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How do you know the internal passages and jets of the carburetor are clean? An engine surging or hunting is a classic sign of a maladjusted or clogged carburetor.

What engine (model) is on the mower ?
 
 

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