I agree that it may be worth checking with an RV service shop for a master key, or at least to identify the lock cylinder.
Originally Posted by Vermilye
... my CH751 key that came with my Escape opens all the outside compartment access doors I've ever tried it in, no matter who the manufacturer.
Jon, you haven't tried my motorhome, although it would
fit the outside compartments on my fifth-wheel trailer.
The CH751 marking indicates a stupidly common key pattern for one particular style of lock cylinder; the style of cylinder is available from multiple manufacturers and is used in both RVs and office furniture (and probably other types of cabinet), typically for cam locks. They're so common that one supplier of replacement locks even uses ch751.com
as their web site address. It is not universal: there are many other lock cylinder styles, even within cam locks.
The CH751 (that cylinder style, and specifically keyed to this particular pattern) is so common that my motorhome came with one of these keys, even though none of the locks (of 8 different types) in the unit are the type which this key fits. Damon must have just automatically put a CH751 key in every set, regardless of the actual RV equipment.
If the lack of security of the CH751-keyed locks is a concern, you can just buy a set of replacement cylinders, keyed alike but to anything other than the CH751 pattern; they're about US$7 each (from various suppliers, e.g. RVLocksandmore.com
). It appears that in some cases you can even match these cam locks to the entrance door, reducing the number of different keys required for the trailer, and still not having any which match the key on everybody else's keyring.