Export thread

CONFUSED: This motor is for my pressure washer. I just changed the timing gear, but now when i turn it over by hand notice one of the cam lobes is hitting the crankshaft. Marks are aligned. Thought maybe momentum wasn't enough for it to clear so i put it together but cant spin it a full pull of the rope before it just stops turning. Sorry for the poor description not sure how else to explain. Need some help here please!!!!!

Post the part number of the part you bought.

Briggs and Stratton # 797521 Genuine

If the parts are OEM Briggs and all aligned, can't see an interference issue. Obvious you have one or both skewed. Can the new gear go on upside down?

slomo

@slomo From the part picture it looks like it will only fit one direction. I also agree that something isn't set correctly. Some of those Briggs camshafts have a mark that can be mistaken for a timing mark.

If might if you take a picture of how are aligning the gears as we might see if there something you have missed.

Hope these help

the 2nd and 3rd photos is after turning crank by hand. maybe 1/4 to 1/2 turn. Was curious if the plastic lobes or gear have been known to rotate on the metal shaft. Couldnt move any of them by hand. Stab in the dark !

There has been cases where the lobes rotate on the shaft, and in some cases the gear will also rotate throwing the timing off.

only thing I can figure is lobe or gear rotated on shaft. Based on pictures would anyone agree? Or could it be something I'm missing?

I lean with rivets that the gear or lobe rotated on the shaft

Using the ACR a reference point it is in the wrong place for lobe being where it is so I fairly sure the lower lobe (one next to the cam gear is out of place.