ebinmaine 72,988 #1 Posted July 11 Take a quick listen to the video. This engine has virtually no compression and it sounds like it's spitting back out through the carb. 20250711_181904.mp4 Share this post Link to post Share on other sites
squonk 43,939 #2 Posted July 11 Pull the head. Sounds like a bad valve 1 1 Share this post Link to post Share on other sites
ri702bill 9,533 #3 Posted July 12 1 hour ago, squonk said: Pull the head. Sounds like a bad valve Yup.... Looks like a new carb..... was there evidence of water in the intake passage?? That and time will stick an intake valve... my 854 was just like that when I got it.... After removing the head, roll it over a couple of seconds & watch the valves for up & down movement...... 1 Share this post Link to post Share on other sites
Retired Wrencher 5,837 #4 Posted July 12 2 hours ago, ri702bill said: Yup.... Looks like a new carb..... was there evidence of water in the intake passage?? That and time will stick an intake valve... my 854 was just like that when I got it.... After removing the head, roll it over a couple of seconds & watch the valves for up & down movement...... No water 1 Share this post Link to post Share on other sites
ri702bill 9,533 #5 Posted July 12 It could be that there is a chunk of carbon on the seat keeping the valve from closing.... 1 Share this post Link to post Share on other sites
Pullstart 67,042 #6 Posted July 12 Rylee’s Screamin’ Jimmy had the valve keeper come loose somehow one time. That’s the way I bought it. I replaced the valve and keepers and was good to gol sometimes you don’t know until you dig in. 2 Share this post Link to post Share on other sites
JoeM 8,429 #7 Posted July 12 Looks like your going in EB! they talk a little about this in this post. the mention looking through the exhaust port and watching the valve. 1 Share this post Link to post Share on other sites
ebinmaine 72,988 #8 Posted July 12 16 hours ago, squonk said: Pull the head. Sounds like a bad valve 14 hours ago, ri702bill said: Looks like a new carb That's one of my rebuilds. 6 minutes ago, JoeM said: Looks like your going in EB! Got it apart this morning. The intake valve isn't moving. This one won't be fixed for now. The cylinder bore is badly worn and seriously out of taper top to bottom. 1 3 Share this post Link to post Share on other sites
squonk 43,939 #9 Posted July 12 What tractor is that on? 1 Share this post Link to post Share on other sites
kpinnc 14,712 #10 Posted July 12 Well it's a standard bore at least. You got room to get it back to round hopefully. 4 Share this post Link to post Share on other sites
ri702bill 9,533 #11 Posted July 12 "Does not play well with others"..... but it may be freed up rather easliy. A good dose of MMo or PB on the stem so it can wick down into the guide - Turn the crank to a few degrees before TDC on the compression stroke so that the tappet is down. Gently rotate the valve while pushing down - it should pop onto the seat. Repeat as necessary.... Share this post Link to post Share on other sites
ebinmaine 72,988 #12 Posted July 12 1 hour ago, squonk said: What tractor is that on? It's a B80. Replacement engine of course. 45 minutes ago, ri702bill said: it may be freed up rather easliy It's not stuck. The valve lifts right out. I'd say the keepers have come un-keepered. Share this post Link to post Share on other sites
Handy Don 14,129 #13 Posted July 12 14 minutes ago, ebinmaine said: the keepers have come un-keepered. How un-helpful! 1 Share this post Link to post Share on other sites
ri702bill 9,533 #14 Posted July 12 (edited) Unkept keepers!!! Possibly installed upside down. Did the valve spank and bounce off the head?? Edited July 12 by ri702bill 1 Share this post Link to post Share on other sites
Pullstart 67,042 #15 Posted July 12 Finders keepers losers Kohlers 4 Share this post Link to post Share on other sites
kpinnc 14,712 #16 Posted July 12 3 hours ago, ebinmaine said: I'd say the keepers have come un-keepered. Most irritating part of a rebuild, even with a compression tool. They should call those "swear tabs" or something like it. Keepers... More like throwers! Make you wanna throw the whole engine out the window. At least on my K161 anyway. Never had that much trouble on a big block. 1 Share this post Link to post Share on other sites
Handy Don 14,129 #17 Posted July 12 (edited) On the advice of an “old hand” small engine guy, I invested in a “Briggs”-style valve spring compressor. Worked like a champ on the K181. It adjusts to different diameters independently for top (spring only), and bottom (keeper). The “compressor” screw is very fine-threaded so it takes a bunch of turns to compress the spring, but it gives a very handy “handle” when removing or inserting the spring/keeper. The grip is enough to tilt the compressed spring/keeper so it aligns with the valve stem so you can remove or insert the valve easily. Edited July 13 by Handy Don 1 Share this post Link to post Share on other sites
squonk 43,939 #18 Posted July 12 I use the "C" clamp style. Keeps the valve against the seat. Then a dab of grease on the keeper groove of the valve and on the keeper. A pencil magnet and a tiny straight blade screwdriver. I also have the block on the bench and tilted so gravity assists on getting the keeper in place. 2 Share this post Link to post Share on other sites
ebinmaine 72,988 #19 Posted July 12 3 hours ago, ri702bill said: Did the valve spank and bounce off the head?? Not that I can see 1 Share this post Link to post Share on other sites
Retired Wrencher 5,837 #20 Posted July 13 (edited) 13 hours ago, squonk said: I use the "C" clamp style. Keeps the valve against the seat. Then a dab of grease on the keeper groove of the valve and on the keeper. A pencil magnet and a tiny straight blade screwdriver. I also have the block on the bench and tilted so gravity assists on getting the keeper in place. Mike I have the same one but i tape a short box wrench on it It is better than the plastic knob. I double nutted it also. Edited July 13 by Retired Wrencher 1 Share this post Link to post Share on other sites
adsm08 3,338 #21 Posted July 13 20 hours ago, JoeM said: Looks like your going in EB! they talk a little about this in this post. the mention looking through the exhaust port and watching the valve. That's where my missing head gasket went. It's in that JD engine. 1 Share this post Link to post Share on other sites
ebinmaine 72,988 #22 Posted July 13 2 minutes ago, adsm08 said: That's where my missing head gasket went. It's in that JD engine. Ya know.... I thought of you and the search for a gasket with a fire ring as I was removing this one. No fire ring here either. Share this post Link to post Share on other sites
adsm08 3,338 #23 Posted July 13 6 minutes ago, ebinmaine said: Ya know.... I thought of you and the search for a gasket with a fire ring as I was removing this one. No fire ring here either. I still want to find that too, but I had been keeping two of those head gaskets on hand, and I've been searching the garage for months unable to find the second spare. I forgot that I tore the head off that JD engine when I was trying to put it in the 855, and I never replaced it in my parts stock. 2 Share this post Link to post Share on other sites
