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ONAN Carb heat

Here are some pictures of the carb preheat system on the Onan.

	Here is a view of the air scoop. In the upper left of the picture you can see the flex pipe leading to the air cleaner box.
	You can't see much but the silver flex pipe feeding the warm air to a box surrounding the air filter. The flex pipe is removed for ambient temperatures above 50 degrees F.
	Top view - The duct is open except at the left end. You can see the plate welded onto the back on the last few inches of the left side. The air baffle for cylinder head provides the back for the rest of the length of the duct.
	Here is a drawing of the unfolded box.
	Here is a drawing of the unfolded scoop.

Below are some close up pictures of the Original Onan air box and scoop.
            

Here are some pictures of Bob Burkitt's installation.

Last update December 10, 2004