B&S 675 Series Camshaft Problems? Overheat? What did I do?

It has been many years ago, but I had a similar issue with a pressure washer. The customer stated it just quit. After taking the base pan off found the crank gear had sheared the "key" off and did not drive the cam. Talked with Briggs and they stated the gears failed especially on pressure washers. But don't remember the replacement but think it was metal.
 
For those impressed with the "paint" technique, i got the idea from Adam Savage, the mythbuster. He used this technique to make new metal things look old and used - when making movie props in his previous life. And then more recently I've seen people use the same technique to highlight the sizes on their sockets and wrenches. Which is something I would LOVE to do, except I have so many sockets, no way am I taking the time to wipe paint on and off each one!
 
To achieve a result similar to paint without the mess use a white tire marker stick. Much easier to read numbers on sockets and such.
 
I like the permanent-ness of paint though. And honestly i'm very tempted to do this to every tool I own that has sizing imprinted on it. BUT do I really want to spend all that time doing it? Mehhhhh. If I ever have a slow week, maybe ill do it.
 
l008com said:
Ok I pulled the plastic cover off, the metal cover and this is the ONLY numbers I could find. They don't appear to be the right format though. I scoured the rest of the motor and couldn't find any other numbers anywhere.
Click to expand...
The engine number should be right on the flywheel cover right on the piece that is over the muffler you my need to use steel wool to remove the rust the numbers should be stamped there
 
So I've replaced the timing gear and a few other things. But I haven't tested the motor yet, the machine is still all apart, its going to take me a few more hours to get it all reassembled and ready for a test.

I'm hoping everything goes great, and I get a bunch of years out of this machines.
But if I don't, and somehow the engine is dead, I was looking at replacement engines as my PLAN B. HF does have one vertical shaft engine, but the output shaft is totally different.
Thats likely going to be the case for every lawmower engine. Does that mean I'm out of luck for this thing? Is the only engine thats going to work, going to be the original motor?

The impeller on this yardvac is not keyed, It is tapered to match the shaft and you just crank it down real tight. Meanwhile, this is what the HF predator looks like: https://www.harborfreight.com/media...58f04aec81e7c5e0be4c56edf041/7/2/72851_W4.jpg
 
So what do you do? Is there really no way to replace the motor if it was dead? Or would I have to try to transplant this one's crankshaft into a different motor?
 
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