Posted by Ray PA on February 12, 2014 at 21:12:09 from (151.213.56.126):
Hello Gents,
New contributor here. First thank you all, I’ve gotten a lot of good info from your past posts which have helped a lot but now I’m stumped. I have had my 9N (S/N 85732) about 10 years now and it has been getting progressively harder to start over the last 2 years or so. Past starts have required cleaning or replacing points each time I ran it (points are not burned and have no visible deposits on them?) and jumping with 12 volt battery. Last successful start was back in August. Since then I’ve put in 20+ hours of tinkering including installing a 6V pos ground Pertronix Elec Ignition (EI) with no luck. Tractor is stock except for electronic ignition (front mount coil). I have fuel, spark and compression but still will not fire (or even cough!) I’m no professional wrench but I consider myself an adequate shade tree mechanic. Here is what I’ve tried:
1. Read 75 tips (great info)
2. New battery (Deka)
3. 3 New cables all 0 gage or heavier (pos, neg bat and starter cables)
4. New rotor and cap
5. 2 New coils ( Resistance; .8 (original), 1.2, and 2.1 ohms)
6. New plugs
7. New condenser & points (after failed to start with EI)
Results:
8. Starter turns over motor normally (12 volt jump achieves 1/3 higher rpm)
9. Good Spark at all cylinders with test plug set at ¼ inch and with stock gapped plugs (slightly better spark with 12 V crank)
10. Good fuel at carb drain (steady stream for 30+ seconds)
11. No luck with starting fluid sprayed into carb or directly into #2 or #3 cylinder
12. Static timing checked correct at ¼” past upper bolt hole
13. Suction at carb and compression at plug holes when cranked (no compression gage but blew my finger off hole)
14. With EI, 6.15 V at ignition module, 2.34 V at top of coil
I’m tired of cutting my field with a scythe (I really did!) and shoveling my driveway while the 9N sits in the barn. Any ideas (or offers to take it off my hands!) are greatly appreciated.
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