I know that I have seen posts on this subject before, can't seem to find any now.
I bought an Ariens YT13H with a blown engine just because I had a "similar" engine sitting here that I am tired of looking at; as it turns out what I am about to ask about, is one of the same 2 reasons I could not use this dust collector engine on the machine that I originally intended to.... it has no fuel pump.
the other reason that I could not use this engine on the machine that I bought it for was the bottom-exit exhaust interfered with the frame of the other machine. but it is an "almost" identical drop in for this Ariens.
The engine happens to be a Tecumseh Enduro 13hp OHV vertical shaft. but it could be any engine without a fuel pump installed in an application that needs one.
The blown engine that I removed was a 13hp Tecumseh OHV Formula. With a vacuum pulse pump.
and a 90*, 1/8" pipe thread nipple screwed into the front face of the block, about an inch from the top.
I thought i'd seen them take their pulse from a nipple elsewhere on other engines but I am having a brain fart since the last few fuel pumps I have dealt with have been mechanical ones on K series Kohlers.
Yeah, I could drill and tap a hole close to the same location like the old engine had, and call it "done". but to do it right I would feel compelled to pull the sump off and blow out the block with Brake clean to make sure there are no metal chips remaining within. but I really don't want to have to do that.
I stuck a phillips screwdriver in the threaded hole for the nipple in the old engine, there does not appear to be any sort of a baffle nearby to deflect oil splash or anything.... so is that the answer? drill, tap, thread-in and done? or is there another way? At the moment I don't know that the fuel pump is any good, or if the diaphragm may be blown and diluted the oil to cause the old engine to blow in the 1st place? (Speculation there/ the oil that came out did not seem thinned out)