Posted by Janicholson on January 18, 2011 at 10:03:21 from (199.17.6.165):
In Reply to: H throttle position posted by Melnick on January 18, 2011 at 08:16:50:
If the starter spins the engine fast enough the impulse coupling will not engage. It will however not have enough velocity to start well without the impulse. If it spins over pretty fast, this can be the cause. Shutting the throttle causes it to turn some what harder pulling against a vacuum. (not always) If it pull starts easily with the throttle at any position, I would suspect this. A leaky intake manifold is also a possible source of vacuum leak. Some are cracked on the inside of the manifold. Using a 6 volt battery (and alternator, they are available) or generator, will slow it down if the speed is causing the issue. Jim
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