Posted by andy r on June 29, 2021 at 21:35:54 from (208.126.193.44):
A neighbor asked for some help on a Hart Par 18-28. This tractor hasn't ran in years. Cylinders #1,#2,and #3 seem to have pretty decent compression. I would say #4 is on the weak side. He did have the mag professionally rebuilt as well as the carburetor. The magneto and carburetor are all back on the tractor. I took my John Deere 70 over and we belted them together. It does not want to run. It will pop, bang, and belch once in a while, but not really run. If you take the spark plugs out and lay them against the engine block/head the magneto will fire them when the engine is cranked. I guess my questions are: 1) It appears that there is no timing adjustment? The magneto just bolts down to the piece of iron under it and that is it - no advancing or retarding - is that right? Top dead center on # 1 cylinder seems to be right at the time # 1 on the magneto fires. Secondly, the throttle butterfly doesn't seem to open as far as I would like. That throttle linkage behind the carburetor is very unusual. We did shoot some oil in the spark plug holes to seal things up better. Have tried a squirt of gas in the cylinders. What would you guys suggest as further trouble shooting options as we try to get this Hart Par running? Thanks you.
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Today's Featured Article - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
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