Alex175 784 #1 Posted October 23, 2019 So while operating my C-175 earlier this year, it sputtered and died on me in the woods. I got it back to my garage and it sat for a while before I had a chance to diagnose it, and when I finally found the time I discovered that I had a stuck intake valve. I figured this out as it would run on one cylinder, and I was getting fuel blowing back up through my carburetor and out the air filter intake. Well I finally made some time to take the head off and check (thankfully it was the front cylinder and easy to get to), and what I found blew my mind. Thankfully I didn't bend a valve, and everything seems to seat fine now and the tractor is back up and running better than ever. It looks like one of my air filter housing screws must have come loose and found it's way down through the carb and into the valve. I am extremely fortunate that it didn't cause any damage on it's way through, and that it didn't get into the cylinder. 2 1 2 1 Share this post Link to post Share on other sites
Pullstart 66,839 #2 Posted October 23, 2019 Lock washers or medium lock tite is a good reminder I suppose. Thanks! I’m glad to see no harm, no fowl. 1 Share this post Link to post Share on other sites
pacer 3,177 #3 Posted October 23, 2019 1 hour ago, Alex175 said: getting fuel blowing back up through my carburetor and out the air filter intake. Thats the perfect description of that..... How do I know?? Wellllll, I've got an Onan twin which means the carb is sitting above the heads/valves and twice now I had one of the air filter housings screws come loose and of course it went right to an intake valve. When I replaced them the first time I really got down on the screws and though that would be that. Nope, did it again and this time I DID use some loctite on the threads! Like yours, the valve/seat was still pristine 3 Share this post Link to post Share on other sites
roadapples 6,983 #4 Posted October 24, 2019 I always use loctite on those screws... Share this post Link to post Share on other sites
