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Phil..... ...the time to worry about yer extra filter is when it is "full" of gas. That means it is CLOGGED!!! While 90psi is Fords min-spec for N-Flatheads compression, I wouldn't really worry about the 75'pounder. (yet) You really need to do a "wet" compression after a dry test. That will tell you the quality of the rings/compression. A no-increase would indicate burned exhaust valve or blown headgaskett. Usually the inablity to start on ether "quick-start" is a sparkie problem. Modern no-lead gasoline leaves invisable deposits on the center insulator and them lazy sparkie leak down the insulator instead of jumpin' the gap like they're supposed to. I ALWAYS replace hard-to-start engines with NEW SPARKIES. AutoLite AL-437's gapped 0.025" are recommended. Next sparkie suspect is the points. They gitt invisable deposits on them and cause weak sparkies. I run a strip of brown paperbag thru the closed points to "polish" them. Don't have a paperbag to tear up? use a dollarbill. Old engines that aren't frequently started, just kinda moulder away and become difficult to start. Goes with the territory. A good $50 tune-up parts would probably solve most of yer neighbors hard-start problems. I'm NOT IMPRESSED with yer report of good local tractor mechanic's work. Remember, there is nothing exoctic about N-Engines. They were designed for horse farmers to work on..... ...Dell
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