bmwford94 0 #1 Posted January 14, 2011 I have a 1973 12hp kohler, and i just recently re bore the spark plug hole and put a new helicoil into the engine. The tractor has spark, compression, and it turns over just fine. I recently cleaned out the carburetor and added new fuel. It however does not start it just cranks and cranks and cranks. Any suggestions? I am eventually going to locate an original 8hp for the restoration so once that happens it wont be a problem, but for now id like to plow the snow yet this year. thanks :banghead: Share this post Link to post Share on other sites
rmaynard 16,342 #2 Posted January 14, 2011 Did you do the heli-coil with the head on or off? Share this post Link to post Share on other sites
bmwford94 0 #3 Posted January 14, 2011 i did it with the head on, my dad is an auto mechanic and he helped me do it, since he has experience with re-threading. He also was at it today and said "its like the engine is running backwards" meaning instead of taking in the gas it spits it out thru the carbeurator. its messed up!! Share this post Link to post Share on other sites
rmaynard 16,342 #4 Posted January 15, 2011 My concern is that you got metal debris down under the head and it has migrated into the intake valve and locked it open. You may want to pull the head and see what going on. Just my 2 cents worth. Someone else may chime in with a different take. Good luck Share this post Link to post Share on other sites
Jim_M 179 #5 Posted January 15, 2011 You might have an aluminum chip, from tapping the hole, stuck in the intake valve and holding it open. Share this post Link to post Share on other sites
Jim_M 179 #6 Posted January 15, 2011 Bob posted while I was typing. That's what I get for typing so slow. We're in agreement though. Share this post Link to post Share on other sites
mavfreak 11 #7 Posted January 15, 2011 Ill say the same thing. Pull head and look at valve Share this post Link to post Share on other sites
bmwford94 0 #8 Posted January 15, 2011 im open to trying all of your suggestions, now ive got to find the time! thanks you for the suggestions!! :banghead: Share this post Link to post Share on other sites
TT-(Moderator) 1,162 #9 Posted January 15, 2011 :banghead: Isn't this the tractor that wasn't running correctly BEFORE you did the Heli-Coil? Share this post Link to post Share on other sites
bmwford94 0 #10 Posted January 15, 2011 Yep this is the one where I parked it and it didn't work. Share this post Link to post Share on other sites
daemon2525 5 #11 Posted January 15, 2011 Sorry, who in the world would tap a hole where the crap could fall down into the engine and expect it to run. Share this post Link to post Share on other sites
WH nut 553 #12 Posted January 15, 2011 Its spitting because the intake valve is stuck open, just like the rest have said. Only takes a couple minutes to pull the head Share this post Link to post Share on other sites
bmwford94 0 #13 Posted January 15, 2011 Well I blew the whole general area of where I tapped the hole with air compressor, I'll remove the head on the thing and see whats down there or is the problem. Share this post Link to post Share on other sites
flyovrcntry 115 #14 Posted January 15, 2011 Thats the problem,I bought a real nice briggs for cheap,the guy said the engine was blown.I pulled the dip stick and the oil was clean.I turned it over and no compression on one side.He had the breather off and i osaw only two screws,you know where the other one was.Boy that was one sweet running engine. Share this post Link to post Share on other sites
Forest Road 594 #15 Posted January 16, 2011 Sorry, who in the world would tap a hole where the crap could fall down into the engine and expect it to run. Keep comments like this to yourself. Its all about living and learning. Share this post Link to post Share on other sites
