[Gelbster]

Originally Posted by steved0x

I've got this one:

https://www.amazon.com/gp/product/B00N3PPZZY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Supposed to be the same as the Pyle and others.

I've got an extra oil cap so I just need to get it together and I'll make a DIY and I can send it around for folks to use, although the shipping to/from would come to a significant % of the cost of the whole unit itself...

Steve,
That is the unit I linked on Amazon.Gets good reviews factory responses there.The Fleabay ones are cheaper and are cosmetically different.
That is a good idea you kindly offered - epoxy a brass nipple on the spare/test oil cap ? Something like this +a cap?
Brass 1/8" Hose Barb x 1/8" Male NPT Fitting - AMFLO# 399. Or a 1/4"NPT x1/8"NPT brass bushing with a removeable 1/8" npt hose barb and a 1/8" plug to fill the hole when you are done testing?Source from HomeDepot or similar.
Much better than an uncertain diagnosis of AOS beginning to fail.