Shim Bolt Size for osburn 1800 Insert

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CRJ700

Member
Dec 22, 2017
36
Long Island
Anyone know the shim Bolt size for the Osburn 1800 insert? They don't list the size in the manual or there part list. I need to lift the front of my insert by maybe an 1/8 of an inch because the blower isn't flush and I'm not getting good airflow.
 
How about putting a strip of 1/8" steel flat stock under the front?

I am wondering though how much difference 1/8" will make. That's not very much at all. The 1800 only has a 90cfm blower, so this may make no notable change.
 
How about putting a strip of 1/8" steel flat stock under the front?

I am wondering though how much difference 1/8" will make. That's not very much at all. The 1800 only has a 90cfm blower, so this may make no notable change.
Yeah you were right I ended up finding the right shim size. Osburn wont list the size but I went to the hardware store and 7/16 course thread fit perfect. I raised the front just enough to make the blower flush with the stove and it didn't make a noticeable difference.