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Neos starts if I squirt petrol straight into the carb, runs for about 5 seconds, reves up a bit, and then dies. Has full take of petrol and oil, spark ok, had new carb fitted - was running been left for 5 months now problems.

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You need to confirm pilot jet is clean and clear of fuel gum first step up. in the the pilot jet can it can block with in a week or two so few months is more than possible
the high rev is just what happens when motor out of fuel (so it has used all you pored into the plug hole)
remove carb - remove pilot jet - blow compressed air through the hole pilot jet goes into and replace with cleaned or a new pilot jet
also confirm it is brand new fuel in the tank don't even try to run the old fuel throw every drop away and re fill if you haven't already

Posted on May 25, 2011

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Posted on Jan 02, 2017

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