Honda GX25

[Bob_z_l]

These small gx can suffer from the gasket between carb and head.

Maybe it's the tank vent. Have you tried leaving the gas cap open?

 

Second this...

If it runs fine and stops it does sound like a fuel issue. Tank vent blocked.

[mixedangased]

I had one that started and cut out stright away,wouldnt run for any period ,tried everything,then chainged the coil .perfect !

turned out the coil was faulty

[mixedangased]

Interested to see how this one pans out - we have a similar engine on one of our generators which will run fine after we fit a new spark plug, but then won't restart after it has been stopped. Six plugs fitted so far but no lasting remedy!

 

Have you tried anothr coil ?

[TimberCutterDartmoor]

I also have this engine on an Allen hover mower. Exact same symptoms.

 

R&T mech says it's to do with a small valve in the crankcase which plays up. The mower's been hanging there now for years, not bothered with it sadly.

 

This might encourage me to sort it out...

[waterbuoy]

Have you tried anothr coil ?

 

Nope but will do now!

[Breezeblock]

is this the v twin engine do these not have separate coils for each cylinder

[Andysp]

I have tried to run it with the petrol cap off still no good and tried with air filter off and no good.If it runs for 2 minutes would this not suggest that it is not a coil problem?

[Stubby]

I have tried to run it with the petrol cap off still no good and tried with air filter off and no good.If it runs for 2 minutes would this not suggest that it is not a coil problem?

 

It would suggest that your tank vent is not blocked nor is your air filter .

[Andysp]

On another site a guy advised me to use a small shot of easy start as the engine started to die and if it kept going it would indicate a fuel problem.I don't like using starting fluid but when I gave the engine a gentle spray it gave a small bang and stopped when I pulled the cord again off she went like the clappers I have used her for most of the day with no problems.Thank you all for taking the time to reply.

[Stubby]

On another site a guy advised me to use a small shot of easy start as the engine started to die and if it kept going it would indicate a fuel problem.I don't like using starting fluid but when I gave the engine a gentle spray it gave a small bang and stopped when I pulled the cord again off she went like the clappers I have used her for most of the day with no problems.Thank you all for taking the time to reply.

 

Sounds like you may have had stale fuel perhaps ....