here we go again

[thebeach2008]

hiya after getting my 2ltr Aircooled engine running all be it erracticly, i started her up today drove of the drive to turn her around, done some work on fitting her out, started her again and turned her around again on the drive no probs (did sound clattery) gone back out now she wont fire up at all ,just turns over not attempting to fire up, any ideas? when she did run the electric pump under the floor clicks all the time is the correct as i thought once they were primed the pump would be quite not clicking very loud

[thebeach2008]

got it running again, right carb had dirt in it, but i cant sus this,
when it starts slightly black sooty smoke comes out both pipes, as it warms say 1 min in it starts to get faster to the point where i have to turn it off as its racing any ideas would be great thankls gary
t25 2ltr Aircooled cu twin solex carbs

[SyncroSwede]

I'm no expert on air-cooled engines but the fast or weird running could be caused by an air leak in the intake system somewhere. On motorbike carb'd engines this is often a cause and easy to spot and fix too. Good luck.

[fullsunian]

What is the fuel filter like? Could do with changing maybe? Like others have said could be an air leak or two that is the problem, check all your vacuum hoses and make sure they are not cracked or badly fitted. One of the best ways to check for air leaks is to spray WD40 on the hoses and round the carb bases, revs will pick up if there are any...Don't forget to look at the balance pipes/hose as well
IAN

[fullsunian]

Oh and forgot to mention that I would clean the carbs out too, including removing the CO screws and blowing them out...

[thebeach2008]

nice one thanks i will give it a go. are there basic set up setting , as i think the previous owner had fiddled with the carbs when it kept cutting out, what screws will i need to set, to give both carbs a basic set up thanks

[fullsunian]

nice one thanks i will give it a go. are there basic set up setting , as i think the previous owner had fiddled with the carbs when it kept cutting out, what screws will i need to set, to give both carbs a basic set up thanks

Sounds like they could do with setting up on a gas analyzer, but for starters screw both C/O screws all the way in then 4 and a half turns out should be about rightish...then get it set up correctly

[thebeach2008]

cheers i will try that tomorrow thanks again