I admire you for figuring it out. We could not get ours going, ordered a replacement pump and it has a sheared off brass bolt right out of the box, Of course we could not tell that it was until it was installed and cranked up and bluey! The bolt head flew off! We're sending it back, get a replacement. I am so sick of that pressure washer. It was my bright idea to try and repair it, now I want to forget the whole thing. :(

UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust kzfaq.infoUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.

You have nothing to be sorry about sir. Haters have to hate. I for one, thank you for the content. And I don't care what anybody says....it's a gosh darn "woodruff key".

His terminology is still correct . Woodruff key is older term. Yes they have a rounded end . But it's the same concept, stop shaming the guy for his use of words .

I think its a shear key to save the pump and engine,like you have in snow throwers.

You probably already have your pressure washer fixed by now, BUT OK! Yes i have a TroyBuilt i bought Refurbished from Sears in 2010 AND IT HAS BEEN A GREAT MACHINE!!! Well last year it just went KA PUT on a job i had to finish, So i figured it was time to R & R the pump. When i took the pump off i quickly discovered there was a problem THERE WAS NO KEY. so i figured just go to ACE HARDWARE and pickup a small 1/4 inch X 1/4 inch key square stock, Well when i went to install it the pump STILL turned and was DEFINITELY not ENGAGING with the engine. I was stumped for about 1/2hr. when i finally RELIESED that one side (that engages engine to the pump) HAD TO BE LONGER/THICKER by about 1/16 of an inch to 1/8 of an inch. So i grabbed my mig welder and piled on the material (VERY CAREFULLY) then when i was done i grinded the taller side of the key flat and installed on the shaft, BUTT the key would NOT SIT still when i wanted to install the pump on the engine shaft SO i tack welded the key on the engine shaft. aaaaannnd WA LA the pressure washer finished the job!! and has worked ever since. PRAISE BE TO GOD!!

At 12:14 you can see that the keyway (slot) on the engine crankshaft has a "mark" in it, near the engine. Looks like the key got loose from wear and walked toward the engine in the keyway. Then it finally got loose enough, and worn small enough, that it finally came out, causing the "mark" in the crankshaft when it left the keyway.

Awesome video, thank you! Crazy that the key was gone haha

Pretty sure they'd use a soft aluminum key to protect the pump and engine if the pressure relief system fails and there's a hydrostatic lock. Over the years it probably ground itself to powder as you suggested. Good on you for figuring it out.

they make that key of some short of plastic, so if the water pump fails the gasoline engine will not break it into pieces. like have a soft bolt on your farm plow, cheaper to replace a bolt that a broken arm on a tracktor plow

i think it is the dirt /shavings inside on top of the piston based on what u show.

my guess is that whoever used a 3/16" x 1" keystock instead of 1/4" x the length of the slot. so as it shifted it shredded the bar stock. steel key stock won't shred like that but aluminum key stock that will sacrifices the key stock instead of the pump or the motor.

I’ve never seen one missing the key way, strange thing for sure I’ve rebuilt a lot of them and kits are not that high price I try E replacement parts first

Had same problem on new pump 2 dollar keyway at tsc

The only part you'll need to get endless service, is a flux capacitor. Order one and you'll never regret it.

I put my pump back together today after replacing 3 check valves, that is when I noticed I had no keyway. I was lucky. I had some 3/16 th metal in the shop and made one. Got it together, and water went right through it out these two small channels on the head of the pump. It was getting dark and I was done for the day. Do you have any clue as what I did wrong?

How in the heck did you get the unloader valve loose from the pump? Its a brass nut and it seems like it just can’t be broke loose. Almost seems like I need to put an impact wrench on it!! Thanks

I watch the video about 4 times and see exactly the same pressure washer pump I have and pump unloader stock and I can find a place to buy (completely stock) any suggestions where to buy ,please help

It chowed the key!

seems to me that if the key was shredded (and it def appeared shredded) something locked it up.

Not a woodruff key hot rod. Standard key, ya know, common practice

You caan get about any thing at Mcmasters and Catrr.

Add after only 90 sec?

Where is Part 2?

That is a standard square key, not a Woodruff key.