Secondary Air Tubes Replacement - Osburn 1800 Owner's Manual

4. Install the middle (F) and rear (G) secondary air tubes ensuring air holes face forward. Install the
cotter pins as in fig 13.
All firebrick and duraboard baffles must be properly in place for correct burning
operation. Have any damaged firebricks replaced. Check the firebricks annually for
damage and replace if they are broken or damaged. See Figure below for the firebrick
layout. Install the side & back firebricks first, and then the bottom firebricks.

SECONDARY AIR TUBES REPLACEMENT

(See Figure 13)
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