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"Hunting" engine


andy1960

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Hi ...not directly miliitary but looking to the groups expertise....can anyone remind me why a 4 stroke petrol engine would "hunt" ( rev up and die down of its own accord) when ticking over. Fuel problem ? Electrical/distributor ?Any suggestions welcomed.Thanks Andy

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Hi ...not directly miliitary but looking to the groups expertise....can anyone remind me why a 4 stroke petrol engine would "hunt" ( rev up and die down of its own accord) when ticking over. Fuel problem ? Electrical/distributor ?Any suggestions welcomed.Thanks Andy

 

It might help if we knew what the engine was. If it is fitted with a governor, this could be causing it. Could also be restricted fuel supply ............. Is it a lawn mower engine?

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It might help if we knew what the engine was. If it is fitted with a governor, this could be causing it. Could also be restricted fuel supply ............. Is it a lawn mower engine?

 

1948 Triumph Roadster..."Bergerac" triumph with dickie seat in the back !

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the esiest thing to do would be to have a fiddle with the volume control screw on the carb (not the stereo) might be a rich mixture making it hunt

 

Question is then why has the mixture changed? Might be worth considering a complete carb re build. The idle jet could be worn blocked, you haven't said where the engine is, and has it been sitting for a while, especially with old fuel in?

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