06-02-2014, 11:19 AM #1
- Join Date
- May 2014
Polaris Factory Specs vs. Triple Outlet Pump
Okay this may be a very dumb question but I can guarantee it will at least be long so please bear with me.
I just rebuilt a set of 1994 polaris sl 750 carbs and will be installing a new triple outlet fuel pump as well. While I set the low and high speed mixture screws to the factory recommendations it got me to thinking. All three carbs have the same size jets in them and all three carbs should receive the same amount of fuel with the new fuel pump, so why would all three carbs have a different setting for the high speed mixture screw? Is it because the factory recommendations took into account that all three carbs were operating from one single fuel line and they would not all receive the same amount of fuel? Could somebody please straighten me out on this subject! Do I leave the mixture screws the way they are or should there be a balanced setting between all three?
06-02-2014, 12:21 PM #2
- Join Date
- Jun 2010
- Milwaukee WI
Its because of the 3 into 1 exhaust manifold and engine cooling. Some cylinders run hotter and leaner than others and need additional fuel to compensate.
06-03-2014, 08:33 AM #3
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