I have a John Deere 60 lawn tractor. When I restored it, I put a NOS 57 RER block in it. Everything was new. I had the technician at the store here set the points for me because at that time, I could not get that. Since then, it has never ran correctly. Has good spark, and is getting fuel. I have always left it back in the corner of our shop until I got tired of looking at it sitting. Well the time has come. I took it out of storage about 2 weeks ago. put new battery in it, cleaned carb, rebuilt and installed. checked spark, had good spark, replaced spark plug just for good measure. I cranked on it for a while and nothing. started adjusting crab jets and it finally started. Ran very poorly so I adjusted until it ran at best decently. It ran for a while then died. I couldnt get it to start again until I adjusted jets to where it would start and then once it started once again, ran poorly. Adjusted accordingly again, and it ran for a while again, then died and process was again started over. I thought maybe one of my jets was bad so I bought another carb kit and replaced jets again after cleaning. and this time installed an in line see through fuel filter so that I knew I was getting clean fuel and my delivery of fuel was good. Still changed nothing. Getting good fuel, good spark, and it wont start unless I turn the jets out. Then when it does start, it really never has run smoothly. I am a bit confused at what the problem could be since everything is essentially new in it. I was wondering if anyone here had any ideas? I am away from my shop for a couple of days now, but as I wait to get back, hopefully I can get some ideas on what to do with this thing. Another note, when it dies it is immediate. It gives no signs of sputtering, which sounds kind of like ignition to me. I just hate to pull the flywheel and start messing with that system unless I am sure thats the issue. The next thing I was going to try was a cylinder leakdown test to see if there is anything there.
Thanks in advance,