Most likely you will not see any difference. If you are maxing out the output of the present alternator there may be some advantage otherwise all that will happen is the battery may get recharged just a bit faster the with the 63 amp. One the battery has reached the voltage regulator cur off voltage the 100 amp will not produce any more amperage than the present 63 amp unit.
There are a couple downsides. One that has already been mentioned here is the need for a larger wire from the alternator to the starter solenoid. When IH released 2+2 tractors with 100 amp alternator they uses two 10 gauge wires connected in parallel for this. The other downside is the alternator itself. It is easy to build the alternator to produce 100 amps but if it allowed to run at that level for any length of time the alternator will have over heating problems. Delco Remy used a 12 SI unit to overcome the excessive heat problem. Most of the components will interchange with the 10 SI but a different fan and housings are used t get more air flow through the alternator.
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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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