Re: Still no start

Posted by KEB on May 19, 2007 at 18:59:48 from (72.19.170.5):

In Reply to: Still no start posted by CNKS on May 19, 2007 at 18:26:25:

Hi, yes a vacuum leak can result in a mixture too lean to fire. I've had decent luck finding vacuum leaks with aerosol carburetor cleaner - close the choke all the way, crank the engine, spray carb cleaner around the edges of the manifold and anywhere else there may be a leak. If there's a major vacuum leak, the engine should fire when you spray carb cleaner into the leak.

Be careful you don't accidently ignite the carb cleaner - some of its pretty flamable.

Another way to check is to put your hand over the carburetor throat and crank. You should feel a strong pull - if you don't, there's likely a significant vacuum leak somewhere. If you're really, really lucky, you might be able to hear the leak hissing when you crank with the carburetor throat covered.

Good luck, keep up posted.

Keith

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