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Hi Daniel my name is ***** ***** I will assist you. the problem you are describing could also be coming from a fouled spark plugs or a dirty carb. So what i first suggest you do is to remove the plugs and check the burn. It should have a brownish color. If it is too black then there is too much fuel going to that cylinder, whilst if it is white fuel is not going in or not being burnt. At this stage i would have the spark on each plug checked and if one of the is not a blue spark then try and change the spark plugs. If the spark is ok then next step is to remove the carbs and give them a good clean, especially if the engine has not been used for a while. Finally if the problem persists, you would need to check also the fuel pump which may have started to crack thus allowing too much fuel into the engine.
Check the above and let me know.
Hi did you manage to solve the problem? Do you require further assistance?
Hi again, ok at this stage i would first try a set of spark plugs and see how it goes as the top may be fouled. If it still persists then rebuild the pump.