bootser..........Ford specs fer 8N flathead engine is 90psi min. New engine is about 125psi. Most good engines run about 110psi. With low pressure you are quoting, ALWAYS run a dry (5-rumpas min) and then a WET. Squirt about 1-oz oil down the sparkie holes and then re-take yer compression readings. Good engines will up the wet compression about +10psi. Really BAD engines will up the compression +30psi. Many times low compression is "stuck" rings. Gitta can of MMO or ATF and squirt some down the sparkie holes ...then... wait a day. Do a dry compression test again. Remember, write all them compression numbers down (we all have CRS) Then iff'n you don't understand what yer compression numbers mean, post'um. Simple, eh?
BTW, new compression gauges have "instructions" and are NOT expensive. ($25, cheap) ........Dell
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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