WSM 18.5 / Tel-Tru BQ300 Question

[westsidehomebbq]

I would like to replace the original thermometer in my WSM 18.5 with a Tel-Tru BQ300. My question is, before I spend $50 on the new thermometer, will the Tel-Tru fit in the original WSM thermometer hole without any modifications? For some reason I haven't been able to find anything on this topic. Thanks in advance!

 

[Harbormaster]

According to the specs on Amazon, the BQ300 has a 1/2" NPT base which requires a 7/8" hole.
I doubt the stock thermometer has a base that large.
A step bit on low speed will allow you to enlarge the hole with minimal damage to the surrounding porcelain.

 

[westsidehomebbq]

I will pull the original out and take a look at the hole - thank you!

 

[Happy Hapgood]

If you do decide to drill use some blue painter's tape over the whole area including the hole. This will protect the coating and keep it from cracking.