Posted by Janicholson on January 16, 2016 at 10:48:10 from (63.152.212.172):
In Reply to: RPM's posted by drich on January 15, 2016 at 16:16:01:
If you put a tach on the engine, or use a strobe tach, and find it is below the specifies High Idle speed (wide open no load) then work on the governor as described by The Tractor Vet and others. If you intend to spin the engine faster than the original RPM, consider these facts: It was designed with maximum torque and solid Horse power at rated load speed. It was balanced by having a two up two down crankshaft with no balance weights. It has three main bearings, with nothing supporting the crank between 1&2 and 3&4 pistons/rods. It has a carb and manifold designed for full specified throttle. It has valves designed to flow well at full specified throttle. Equipment being used with a PTO will be over speed and dangerous. Making it turn even 2500 will require many modifications: Ports and head flow, cam changes, ignition curve modification, fuel delivery, venturi size change, and others. Jim
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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