Interesting post because I was in the middle of the big switchover in the early 70s from leaded to unleaded and my last year in the service I bought a new 1970 Nova with the 307 engine and always used AMACO unleaded gas because it always burned clean at the exhaust then I traded it a couple years later for a 72 Sebring Satellite. Got a call one night from someone who bought my Nova and said it was having problems and took it to the dealer and said it needed a valve job because they said the previous owner used unleaded gas. I felt bad about it but the deal was already consumated I"ve always been gun shy about the issue until I found out the 307 was an Olds engine and had a multitude of problems. Back to the thread I have a 1970 MTD rototiller with a Briggs engine so I assumed I needed a lead additive so I was adding it and causing the EX valve to stick and old small engine friend of mine said loose the lead additive and you"ll be fine. You know what I did and it works fine. What I"m not smart enough to figure out is why it used and had oil smoke coming out the muffler when using the additive now without it the oil consumption has been drastically reduced. My two cents. CT
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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