Re: international W 450 rare?

Posted by Haas on November 28, 2006 at 08:34:36 from (12.65.60.90):

In Reply to: international W 450 rare? posted by jfunk on November 28, 2006 at 07:26:51:

Gas start diesels??? When you switch to the starting mode, 4 things happen. Valves to the spark plug chambers in the head open. This exposes the spark plugs so ignition can occur and reduces the compression ratio to run on gas. The float in the carburator is released so gas can flow to the carb. In diesel mode, the float is locked up, shuting off the gas flow. The ignition is activated for running on gas. In diesel mode, the ignition is off. And finally, butterfly valves in the manifold direct air flow through the carbureator. In diesel mode, the carb is bypassed so no air flows through it. Sometimes some of this setup gets out of sync, or is bypassed for some reason. If all is working, the starting and switching to diesel is easy and can be done even in very cold weather.

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