Old Screw Holes And Cutout For RV Exterior Light Don't Match Up With New Light M336FR

Published 09/04/2025

Products Featured in This Question

Exterior LED Utility Light - Flush Mount - Powder Coated Aluminum - Clear Lens - 12V DC - Black

(41)

$166.50

Exterior LED Utility Light - Flush Mount - Powder Coated Aluminum - Clear Lens - 12V DC - Silver

(41)

$188.51

Question:

My old screw holes and dimensions don’t line up. cutout size is about 8" by 6" Can I still use the M336FR on my Keystone Cougar?

asked by: Wade

Expert Reply:

Wade, that’s pretty common when swapping lights. Just fill the old holes with butyl tape and sealant, then drill fresh pilots for the new housing. Once it’s snugged up, it’ll look factory again. Only time you'll run into a bigger issue is when you have a large cutout and want to shrink it down for a smaller light - in that case it is a different can of worms since you'd need a trim piece or plate to cover it up.

In your case on the # M336FR (also available in silver # M357FR), just enlarge to the cutout size of 11-5/8" wide x 8-3/4" tall and you'll be good to go!

Anyone else have to redrill or resize when upgrading to these bigger LED housings?

expert reply by: Andrew N