Hi Eddie, when searching for a title or subject or something that contains multiple words with spaces between them, enclose the entire string you're searching for in double quotation marks like this:

"Some Small Horizontal Starting Engine Quirks"

When I did that, your thread came up as the second hit (the reason it was second was because that string was found in this thread, which is more recent) so I can vouch that the thread is there. 
What happens is if you put in a list of words, which to you are a subject or sentence, the search engine just sees them as a list of search terms, rather than a coherent sentence. So, to ensure it's looking for that string of words, enclose in double quotation marks. Give it a shot and let me know how you get on (and here's the link to your thread) www.acmoc.org/bb/discussion-d72/16272-so...engine-quirks#126282