McCoyAn oddball in my lineup is this McCoy .35 that was considered an "economy" engine in its day. Don't know if this one was a bit of a lemon, or if it was typical of production, but it was difficult to lean out properly with the needle valve and seemed a bit weak and inconsistent generally. Just when you'd get it tuned to where you thought it was good to go, you'd release it only to hear it start choffing, choking and burbling before completing one lap. We always rated it as about a .25, and so it never got much use.
Anyway, it still seems to be in my collection, so here it is "pretending" to be a marine engine:

