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Help with bog down

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Charlie
Had a engine do that on me , I started by cleaning the point tips lightlly with a smooth file. The second thing I did was clean the fly wheel and coil with fine sandpaper, and reset the air gap on same[.015-.017]. It seems that when the engine is cold,the point gap and air gap may be close enough to run, but are not within power specs. Once it warms up, and swells, these settings change and are closer to power specs.I,m sure some one in the design dept. took some time when they figured the expantion from cold to hot. Hope this helps Good luck , Charlie

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Guest
I had the good fortune in finding a 1968 Simplicity Landlord 101 early last summer and spending about 6 weeks restoring it's exterior. Mechanically, it was in excellent condition. The only problem I have experienced is during the first 20 minutes (approx.) of operation. Upon engaging the mower deck or climbing an incline with the mower deck engaged, or hitting some high grass, she bogs down and will stall if I don't disengage the deck. After 20 minutes or so however, it is as if it gets a dose of viagra and runs like a champ with no further bog down problem. Many thanks in advance to those with a mechanical diagnosis on how to fix this problem.

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tej
I had a 3212 acting much like you tractor. It would run fine until you loaded it down and the governer engaged. Problem was a leak in the intake manifold gasket. When it had a high demand for fuel it would suck air through this leak and lean out the mixture to where the engine would stall if the load was not taken off of it. If this is your problem the leak may be resealing when the metal gets hot and expands.

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