Topica Loopframe_Guzzi Archive


Subject: RE: Hard Starting Eldo

Author: Lannis

Date: Apr 14, 2005, 3:27 PM

Post ID: 1718703902




A-VAC wrote:
 
I would check your ignition timing. If it is advanced too far, the
compression will make it very hard to turn over.

A-VAC -

I'm not jumping you in particular, but this specific piece of advice has
been given many times by many different people to explain an engine
turning over slowly with the starter.

It doesn't sound right.

The engine doesn't know WHERE the ignition timing is set until the plug
fires and lights the mixture in the cylinder. If that were to happen,
with the ignition too far advanced, there would be a mighty CHUFF as the
engine kicked over backward, opened the intake valve and blew a big puff
out the carburetor.

The ignition timing setting doesn't affect the compression at all. The
cam timing might, if it were allowing valves to open at the wrong time,
but you don't "adjust" that.

But if the engine is turning over, and not firing, then the ignition
timing can't possibly have anything to do with the slow turning.

Can it? Someone set me straight if I'm off base....

Lannis

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