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subaru 9hp spluttering and hunting


Breezeblock
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i haven't done anything on subaru engines at all and am looking for some pointers i have a brand new 9hp subaru engine and it hunts all thru the speed range and does an intermittent back fire every minute or so any pointers i have changed the fuel and cleaned the filter bowl but there was nothing to speak off in it cheers in advance

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Sometimes the main jet in the car is partially blocked.had similar probs on a Honda and it was a fine needle blocking it.a set of car reamers sometimes helps to slightly widen jet and allow more fuel through.problem Def sounds like a shortage of fuel. If the engine has been stored for a while with fuel in it may be a gumming up of the jet too..as a last resort look for a number on the jet telling you jet size (1.2) or similar and change the jet for one size bigger.

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