perry 82 #1 Posted June 8, 2013 it seems to me the exhaust valve is not closing. exhaust coming out of carb. could this be as easy as a head gasket or you think this engine needs a complete valve job ?. I never messed with these OHV engines. http://www.youtube.com/watch?v=tRDaf-fnMoI Share this post Link to post Share on other sites
Fordiesel69 270 #2 Posted June 8, 2013 To me the sound is of a stuck intake valve, or an exhaust valve that is not opening enought to let all the pressure out. Definatly start be doing a valve job, and inspecting the seats. After that im afraid the cam is toast. Any aluminum block, with pressed valve seats can come loose. Cars, diesels, small engines, anything.....so you need to inspect. It is rare on the command for them to come loose. Share this post Link to post Share on other sites
perry 82 #3 Posted June 8, 2013 yep thats exhaust sound you hear coming out of the carburetor. the engine wont rev up either and when i pulled the filter off you could hear it get louder. so my first guess was valves ?. does not sound like a fun job. just about every brand OHV engine that comes through here is junk. Share this post Link to post Share on other sites
TT-(Moderator) 1,152 #4 Posted June 11, 2013 Might be a compression release issue. I'll have to do some more digging when I get a chance. Share this post Link to post Share on other sites
MarkPalmer 81 #5 Posted June 11, 2013 The breather tube on those CV's is connected to the intake, I'll venture to guess that is where the smoke is coming from rather than valves stuck open, but you can pull the valve cover off and check the cold valve lash clearances just for the heck of it. -Mark- Share this post Link to post Share on other sites
perry 82 #6 Posted June 11, 2013 The breather tube on those CV's is connected to the intake, I'll venture to guess that is where the smoke is coming from rather than valves stuck open, but you can pull the valve cover off and check the cold valve lash clearances just for the heck of it. -Mark- engine wont rev up and can feel the exhaust coming from carburetor. . hear it too Might be a compression release issue. I'll have to do some more digging when I get a chance. didn't think about that, ill look into it ......Thanks Share this post Link to post Share on other sites
WH nut 553 #7 Posted June 11, 2013 Could be a plugged muffler Share this post Link to post Share on other sites
perry 82 #8 Posted June 12, 2013 here is a video showing the exhaust valve not moving while engine running. http://www.youtube.com/watch?v=xfBP2yuvwtc&feature=youtu.be Share this post Link to post Share on other sites
WH nut 553 #9 Posted June 12, 2013 here is a video showing the exhaust valve not moving while engine running. http://www.youtube.com/watch?v=xfBP2yuvwtc&feature=youtu.be You found your problem. Open it up. Bad cam or bent push rod Share this post Link to post Share on other sites
perry 82 #10 Posted June 13, 2013 took it apart and then cam lobe is gone and the govenor is toast. never seen a lobe completely wornn off a cam before. Share this post Link to post Share on other sites
